KR20160000838U - Silencer for multi-level building - Google Patents

Abstract

The present invention relates to a noise reduction device for a multi-story building, which is excellent in noise reduction performance compared to a conventional silencer, and which requires less size, weight and manufacturing cost, and can minimize the loss of air pressure.
According to the present invention, there is provided a noise reduction device for a multi-layer building, comprising: a body having an inner space and a pair of side walls (hereinafter referred to as 'first side wall and second side wall' A first sidewall wall protruding from the first sidewall toward the inner space; A first air chamber provided between the first air chamber wall and the inner surface of the body corresponding to a vertical upper portion of the first air chamber wall; A second sidewall wall protruding from the second sidewall toward the inner space; And a second empty space provided between the second empty room wall and the inner surface of the body corresponding to a vertical upper portion of the second empty room wall.

Description

{SILENCER FOR MULTI-LEVEL BUILDING}

More particularly, the present invention relates to a noise reduction apparatus for a multi-story building, which is installed in an exhaust duct of a multi-story building, thereby reducing the noise transmitted from a specific furniture to other furniture through the duct for ventilation. ≪ / RTI >

In a multi-storey building such as an apartment, ventilation pipes are installed vertically from the bottom to the top of the building, and the ventilation pipes are connected to the respective generations arranged on the vertical line to discharge the air of each generation.

However, such a structure causes noise generated in a specific household to be transmitted to other furniture through a ventilation pipe, thereby causing interstage noise.

In the apartment, the noise from the bathroom of each household, the voice of the conversation of the people, and other noise are transmitted to the other furniture along the common ventilation pipe, It is becoming a problem.

In various large buildings, a duct silencer is used. This duct silencer prevents noise from being transmitted by attaching a sound absorbing material to a duct through which the air moves, but the duct silencer has a problem of increasing the volume of the duct.

There is also a muffler for exhaust gas used in automobiles, but it has a complicated structure and it has a problem that it needs to be made of expensive metal in order to block noise emitted from exhaust gas of strong pressure.

As a prior art silencer for a bathroom in an apartment, there is a technique ("Patent Document 1") in which a noise is reduced while a noise is transmitted through an insertion tube by installing an insertion tube in a cylinder equipped with a sound absorbing material. However, There is a problem that the air pressure loss (static pressure loss) and the reduction of the flow path are caused by the obstruction portion (i.e., the separation plate 13) on the flow passage and the exhaust performance of the air conditioner such as the ventilator is lowered.

On the other hand, in order to install a silencer in a bathroom of a multi-story building, it is necessary to provide a device that is as small as possible and easy to install so as to be installed in a narrow space.

Patent Document 1: Korean Patent No. 10-0654288 (Registered Date: November 29, 2006)

The object of the present invention is to provide a muffler which is excellent in noise reduction performance compared with a conventional muffler, requires less size, weight and manufacturing cost, and minimizes loss of air pressure A noise reduction device for a multi-story building.

According to an aspect of the present invention, there is provided an apparatus for reducing noise in a multi-layer building, the apparatus having an internal space, a pair of side walls (hereinafter referred to as first and second sidewalls) A body formed therein; A first sidewall wall protruding from the first sidewall toward the inner space; A first air chamber provided between the first air chamber wall and the inner surface of the body corresponding to a vertical upper portion of the first air chamber wall; A second sidewall wall protruding from the second sidewall toward the inner space; And a second empty space provided between the second empty room wall and the inner surface of the body corresponding to a vertical upper portion of the second empty room wall.

According to the noise reduction apparatus for a multi-story building according to the present invention, there is an excellent effect that a noise reduction performance higher by 5 dB or more than the conventional noise reduction apparatus can be realized.

In addition, the noise reduction device of the present invention has a superior noise reduction effect compared to the conventional noise reduction device, and further reduces product production cost, size and weight of the product, thereby securing price and product competitiveness.

In addition, the noise reduction apparatus for a multi-story building according to the present invention has an extremely simple internal structure and does not reduce the flow path, and thus has an excellent effect of preventing the problem of deterioration of exhaust performance due to loss of air pressure have.

1 is a cross-sectional perspective view showing the internal structure of a noise reduction device for a multi-story building according to the present invention before a sound absorbing material is coupled.
2 is a perspective view showing a sound absorbing material of a noise reduction device for a multi-story building according to the present invention.
3 is a cross-sectional perspective view showing the internal structure of the noise reduction device for a multi-story building according to the present invention after the sound absorbing material is combined.
Fig. 4 is a front view showing an appearance of a noise reduction apparatus for a multi-layer building according to the present invention; Fig.
Fig. 5 is a longitudinal sectional view of Fig. 4; Fig.
Figure 6 is a side view of Figure 4;

The terminology used in this specification is used only to describe a specific embodiment and is not intended to limit the present invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, in the present specification, the term " above or above "means to be located above or below the object portion, and does not necessarily mean that the object is located on the upper side with respect to the gravitational direction. It will also be understood that when a section of an area, plate, or the like is referred to as being "above or above another section ", this applies not only to the case where the other section is " And the like.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

Also, in this specification, the terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

In the following, preferred embodiments, advantages and features of the present invention will be described in detail with reference to the accompanying drawings.

2 is a perspective view showing a sound absorbing material of a noise reduction device for a multi-story building according to the present invention, and FIG. 3 is a perspective view showing a sound absorbing material for a multi- FIG. 4 is a front view showing the external appearance of the noise reducing apparatus for a multi-layer building according to the present invention, and FIG. 5 is a longitudinal sectional view of the noise reducing apparatus for a multi- And Fig. 6 is a side view of Fig.

1 to 6, the noise reduction apparatus for a multi-layer building according to the present invention includes a body 10, a first vacant wall 20, a second vacant wall 25, a first vacant chamber 30, An empty room 35 and an expansion chamber 40, and preferably further comprises a sound absorbing material 50. [

The first noise reduction function is realized by the expansion chamber 40 and the second noise reduction function is realized by the first and second empty rooms 30 and 35. The third noise reduction function is realized by the sound absorbing material 50). Details of this will be described later.

The body 10 of the present invention is a component substantially connected to an exhaust duct of a multi-story building, and has a space therein, and a pair of openings 13 and 14 for communicating the internal space with the exhaust duct are formed have.

The openings of the body 10 are formed as a pair. One opening 13 is formed in the first side wall 11 provided at the front end of the body and communicated with the exhaust duct connected to the inside of the body. The opening 14 is communicated with the exhaust duct formed through the second side wall 12 provided at the rear end of the body and connected to the outside of the body.

The internal space of the body 10 is configured to have at least a larger cross-sectional area than the flow path cross-sectional area of the opening and the exhaust duct because the expansion chamber 40 and the first and second vacancies 30, So that the noise reduction effect can be realized.

According to a preferred embodiment, the body 10 is formed in a cylindrical shape having a pair of openings, and the cylindrical body is composed of a first body 10a and a second body 10b, The first body 10a and the second body 10b are formed symmetrically with each other.

Here, the attaching / detaching means may adopt any of various known means such as a means including a fitting projection and a fitting groove, a means including a hook and a hook groove, and a screw fastening means such as a bolt and a nut.

The body 10 can be made of any solid material such as metal, plastic or wood. However, considering the various factors such as corrosion resistance, hygiene, ease of manufacture, and price of the product, And the like.

On the outer surface of the first sidewall 11 of the body 10, an air inlet pipe 15 protruding in a tubular shape and coupled to an exhaust duct connected to the room can be formed. And an air discharge pipe 16 protruding in a tubular shape and coupled to an exhaust duct connected to the outside can be formed on the outer surface.

Further, a holder for supporting the body 10 to another structure may be further formed on the outer circumferential surface of the body 10. In this case, a support (for example, a wire or a bracket) connected to another structure can be coupled with the holder to stably support the body 10.

The first cavity wall 20 of the present invention is protruded toward the inner space side of the body 10 on the first side wall 11 of the body 10 to form a first cavity 30 in the inner space of the body 10 .

According to a preferred embodiment, the first vacant wall 20 is formed in a cylindrical shape protruding along the periphery of the opening formed in the first side wall 11.

The first empty wall 20 defines a predetermined space between the first empty wall 20 and the inner surface of the body 10 positioned vertically above the first empty wall 20, And the space thus prepared functions as the first empty room 30 of the present invention.

The second empty room wall 25 of the present invention is protruded toward the inner space side of the body 10 on the second side wall 12 of the body 10 to form a second empty room 35 in the inner space of the body 10 .

According to a preferred embodiment, the second vacant wall 25 is formed in a cylindrical shape protruding along the periphery of the opening formed in the second side wall 12, and is configured to have a symmetrical structure mutually opposed to the first vacant wall 20 .

A predetermined space is provided between the second empty room wall 25 and the inner surface of the body 10 corresponding to the vertical upper portion of the second empty room wall 25 by the second empty room wall 25 as described above , And the space thus prepared functions as the second empty room 35 of the present invention.

The first and second vacancies 30 and 35 provided by the first and second vacant walls 20 and 25 are each configured to have a width within a range of 20 to 40 mm. And the second empty room wall 25 are configured to have a clearance K1 of 160 to 190 mm between them, the second noise reduction function can be maximized.

The expansion chamber 40 of the present invention refers to the remaining space of the internal space of the body 10 excluding the first empty chamber 30 and the second empty chamber 35. [ Thus, the expansion chamber 40 is configured to have a cross-sectional area that is larger than the cross-sectional area of the opening through which the noise is introduced.

The sound absorbing material 50 of the present invention is a component mounted on the inner surface of the body 10 to realize a third noise reduction function.

The sound absorbing material 50 may be a polyurethane foam, a foamed aluminum sound absorbing material, an aluminum wool sound absorbing material, a stainless steel wool sound absorbing material, a glass wool or a rocky surface, and preferably a porous sound absorbing material such as a polyurethane foam good.

At least a part of the sound absorbing material (50) is structured so as to be inserted into the first and second empty rooms (30, 35). Therefore, according to the preferred embodiment, the sound absorbing material 50 is formed of a ring-shaped member having a hollow, which is at least equal to or larger than the inner diameter of the opening, and the thickness of the ring- Or the second empty chamber 35).

1, the first and second vacant walls 20 and 25 are formed into a cylindrical shape, and the cylindrical first and second vacant walls are inserted into the hollow of the sound absorbing material 50. In this case, Respectively.

Hereinafter, the first to third noise reduction functions according to the above-described configuration will be described.

First, when the noise is introduced through the opening of the first side wall 11, the noise is diffused from the end of the first vacant wall 20 to the expansion chamber 40 of the body 10, With the expansion chamber structure having a larger cross sectional area, the sound energy is reduced in accordance with the expansion ratio as in a general expansion type silencer, thereby achieving the first noise reduction action.

Next, in the case of remaining noise that has not been reduced through the first noise reduction operation, a part of the noise is introduced into the first chamber 30 and the other part is introduced into the second chamber 35.

The noise introduced into the first empty room 30 (or the second empty room 35) is transmitted to the first empty wall 20 (or the second empty room wall 25) and the first empty room 20 And reflected on the inner surface of the body 10 corresponding to the vertical upper portion of the wall 25).

At this time, the reflected wave is canceled by the noise introduced into the first vacant room 30 (or the second vacant room 35) successively, so that the negative energy is further attenuated, or another vacant room (i.e., the second vacant room 35) Or the first empty room 30), and finally, resonance occurs in which the sound energy is attenuated by being trapped in the vacant room. As a result, the second noise reduction function is performed.

Specifically, the inventor of the present invention confirmed through a plurality of noise tests that the noise corresponding to a sound wave in the range of 1500 to 2000 Hz can be attenuated effectively in the case of the second noise reduction operation according to the design of the gap K1 of the present invention.

More specifically, sound waves in the frequency range of 1500-2000 Hz act as the main noise of the fluid moving along the exhaust duct. It is very important to attenuate the noise of this frequency band. The first and second vacant walls 20, 25) between 160 and 190 mm (most preferably between 170 and 175 mm), the noise of the corresponding band can be effectively attenuated.

Finally, the third noise reduction function is performed by the sound absorbing material 50, which can partially absorb the noise before the second noise reduction action due to its own properties, and can partially absorb remaining noise even after the second noise reduction action .

As a result, according to the noise reduction apparatus for a multi-layered building according to the present invention, the noise introduced through the opening is firstly reduced in noise by diffusion of noise by the expansion chamber 40, The noise is once again reduced through resonance by the vacant room 35, and residual noise is removed by the sound absorbing material 50.

Table 1 below is a comparative table of performance of the noise reduction device for multi-story building and the other type of noise reduction device according to the present invention.

In Table 1, 'Type A' refers to the noise reduction device of the present invention, and 'Type B' and 'Type' C correspond to existing and third party noise reduction devices.

For reference, the size of the sound source (noise) used in the test of Table 1 was 70 dB, and the size of the sound passing through the exhaust duct was 63 dB when the sound source passed through the exhaust duct without the noise reduction device.

The noise reduction apparatus (Type A) of the present invention in the test of Table 1 is such that the outer diameter of the body 10 is 151 mm, the length of the body 10 is 240 mm, and the first and second empty rooms 30, The gap length between the first and second vacant walls 20 and 25 is 172 mm, and the sound absorbing material 50 is made of a polyurethane foam (PU-foam).

division Item Type A Type B Type C One Noise (dB) 53.7 59.4 59.7 2 Cost (won) 6,888 8,440 8,000 3 Size (mm) 156 * 246 200 * 300 150 * 230 4 Weight (g) 600 1000 950

As can be seen from Table 1, the noise reduction device (Type A) of the present invention can reduce the production cost of the product compared to the conventional noise reduction device, and achieve a noise reduction effect of more than 5 dB in performance.

In addition, the noise reduction device (Type A) of the present invention can achieve a relatively simple product structure in spite of relatively superior noise reduction performance, so that the size and weight of the product can be made smaller .

Although the preferred embodiments of the present invention have been illustrated and described using specific terms, such terms are used only for the purpose of clarifying the present invention, and the embodiments of the present invention and the described terminology are intended to be illustrative only, It will be obvious that various changes and modifications can be made without departing from the spirit and scope of the invention. Such modified embodiments should not be individually understood from the spirit and scope of the present invention, but should be within the scope of the present invention.

10: body 11: first side wall
12: second side wall 13, 14: opening
15: air inlet pipe 16: air outlet pipe
20: first vacant wall 25: second vacant wall
30: First room 35: Second room
40: expansion chamber 50: sound absorbing material

Claims (7)

An apparatus for reducing noise by being installed in an exhaust duct of a multi-story building,
A body 10 having an inner space and a pair of side walls (hereinafter, referred to as 'first side wall 11 and second side wall 12') formed with openings facing each other;
A first cavity wall (20) protruding from the first side wall (11) toward the inner space side;
A first air chamber 30 provided between the first air chamber wall 20 and the inner surface of the body 10 corresponding to a vertical upper portion of the first air chamber wall 20;
A second vacant wall (25) protruding from the second side wall (12) toward the inner space side; And
And a second empty room (35) provided between the second empty room wall (25) and the inner surface of the body (10) corresponding to a vertical upper portion of the second empty room wall (25) Noise reduction device.
The method according to claim 1,
Wherein the first vacant wall (20) and the second vacant wall (25) are each formed in a cylindrical shape protruding along the periphery of the opening.
The method according to claim 1,
Wherein the first and second vacant walls (20, 25) are configured to have a clearance (K1) of 160 to 190 mm relative to each other.
The method according to claim 1,
Wherein the first vacant space (30) and the second vacant space (35) are each configured to have a width within a range of 20 to 40 mm.
The method according to claim 1,
Further comprising a sound absorbing material (50) inserted at least partially in the first and second empty rooms (30, 35).
6. The method of claim 5,
The sound absorbing material (50) is formed of a ring-shaped member having a hollow, wherein the hollow is at least equal to or larger than the inner diameter of the opening, and the thickness of the ring-like member is equal to the width of the first or second empty room Or smaller than that of the noise reduction device for a multi-layered building.
6. The method of claim 5,
Wherein the body (10) has a first body (10a) and a second body (10b) which are mutually separable and connectable to each other to have mutually symmetrical structures.

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