JP6936568B2 - Double skin structure - Google Patents

Description

The present invention relates to a double skin structure constituting an outer wall portion of a building.

One of the exterior walls used to improve the heat insulation performance of a building is known to have a double-skin structure. In such a double skin structure, a space (ventilation space) is provided between the outer member (outer skin) and the inner member (inner skin). In summer, in order to prevent the temperature rise in this space, an opening is provided between the outer skin and the inner skin, or a part of the outer skin to ensure the introduction of outside air into the ventilation space and the flow of air. ..

For example, Patent Document 1 (Japanese Unexamined Patent Publication No. 2013-181333) has a double-skin structure composed of a frame-shaped PC unit, which is projected from the left and right front of the frame of the PC unit to block sunlight from the left and right. The sleeve wall for the purpose, the outer sash that is driven into the sleeve wall and can install the outer surface material, the inner sash that is arranged to face the outer sash via the hollow layer and can install the inner side material, and the sleeve. A double-skin structure is disclosed, which is provided on a wall, includes a communication port for communicating the outside and the hollow layer, and has a stepped portion formed on the outside of at least one side surface of the sleeve wall.
Japanese Unexamined Patent Publication No. 2013-181333

In the exterior wall having a double-skin structure, it is possible to contribute to temperature control in the building by ventilating from the opening end in the ventilation space between the outer skin and the inner skin. However, on the other hand, there is a problem that the opening end portion has a sound insulation defect, and the sound insulation performance of the exterior wall having a double-skin structure is significantly deteriorated as compared with the case where there is no opening end portion.

At frequencies where the width of the ventilation space in the double-skin structure is less than half the wavelength of the sound wave, noise propagates two-dimensionally in the ventilation space. Therefore, the noise propagating upward from the lower opening end has a smaller distance attenuation than the noise propagating in the three-dimensional space. For example, in the case of a point sound source, the distance attenuation in the three-dimensional space is -6 dB as the distance from the sound source doubles, but in the case of the two-dimensional space, it is -3 dB.

Therefore, in the exterior wall having a double-skin structure, on the upper floor, due to the influence of noise propagating two-dimensionally from the open end of the lower floor, the inner skin becomes the inner skin as compared with the case of the single-skin exterior wall. There is also a problem that the sound pressure level of the incident external noise becomes high, a member having higher sound insulation performance may be required, and the cost is high.

So far, no proposal has been made to solve the above-mentioned problems such as deterioration of sound insulation performance in the double-skin structure, which has been a problem.

The present invention solves the above-mentioned problems, and the double-skin structure according to the present invention is provided on an outer member having a main surface extending in the vertical direction and a horizontal direction at a predetermined distance on the indoor side of the outer member. The lower opening end is below the ventilation space formed between the outer member and the inner member, and the upper opening end is above. A resonator having a double-skin structure that is arranged and constitutes the outer wall of the building and has a slit-shaped opening is provided between the outer member and the inner member so that the slit-shaped opening faces in the horizontal direction. It is characterized by being arranged.

Further, the double-skin structure according to the present invention is characterized in that a resonator is arranged in each of the outer member and the inner member.

Further, the double-skin structure according to the present invention is characterized in that the slit-shaped openings of the resonator of the outer member and the inner member are arranged so as to face each other.

Also, double-skin structure according to the present invention is characterized in the that the resonator is disposed in the lower open end of the ventilation space formed between said inner member and said outer member.

Further, the double-skin structure according to the present invention is characterized in that the resonator is divided into a plurality of sections by a partition plate member.

In the double-skin structure according to the present invention, a resonator having a slit-shaped opening having an acoustic impedance ratio of 0 is arranged between the outer member and the inner member, and such a resonator according to the present invention. According to the double-skin structure, it is possible to improve the sound insulation performance of noise propagating in the ventilation space, and it is not necessary to use an expensive member having high sound insulation performance for the inner member, so that the cost can be reduced. become.

Further, according to the double-skin structure according to the present invention, it is possible to prevent the open end of the ventilation space from becoming sound-insulating defect and improve the sound-insulating performance of the exterior wall having the double-skin structure. The introduction of outside air into the ventilation space and the flow of air can be maintained.

Further, according to the double-skin structure according to the present invention, since the resonator is a long body having the same cross section, it is easy to manufacture and install, and it is possible to reduce costs associated with an increase in manufacturing, transportation, and construction man-hours. can.

It is a figure which shows the ventilation space 100 in the double skin structure 1 which concerns on embodiment of this invention. It is a figure explaining the noise reduction principle of the double skin structure 1 which concerns on embodiment of this invention. It is a figure explaining the resonator 10 used for the double skin structure 1 which concerns on embodiment of this invention. It is a figure which shows the double skin structure 1 which concerns on embodiment of this invention. It is a figure explaining the manufacturing process example of the resonator 10 used for the double skin structure 1 which concerns on embodiment of this invention. It is a figure which shows the double skin structure 1 which concerns on other embodiment of this invention. It is a figure which shows the double skin structure 1 which concerns on other embodiment of this invention. It is a figure explaining the resonator 10 used for the double skin structure 1 which concerns on other embodiment of this invention. It is a figure which shows the double skin structure 1 which concerns on other embodiment of this invention. It is a figure which shows the double skin structure 1 which concerns on other embodiment of this invention. It is a figure which shows the double skin structure 1 which concerns on other embodiment of this invention. It is a figure explaining the resonator 10 used for the double skin structure 1 which concerns on other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the principle of the noise reduction method adopted by the double skin structure 1 according to the present invention will be described. FIG. 1 is a diagram showing a ventilation space 100 in the double skin structure 1 according to the embodiment of the present invention. Further, FIG. 2 is a diagram for explaining the noise reduction principle of the double skin structure 1 according to the embodiment of the present invention. In FIG. 2, only the inner surface of the ventilation space 100 of the double skin structure 1 is extracted and shown.

The double-skin structure 1 constitutes an outer wall portion of a building composed of an outer member 4 and an inner member 5 provided on the indoor side of the outer member 4 at predetermined intervals. The hollow layer space formed between the outer member 4 and the inner member 5 is referred to as a ventilation space 100.

In summer, air is introduced into the ventilation space 100 of such a double-skin structure 1 from the lower opening end 110 and discharged from the upper opening end (not shown) to mitigate the influence of sunlight or indoors. Improve the thermal environment. However, on the other hand, the opening end portion becomes sound insulation deficient, and the sound insulation performance of the exterior wall having the double skin structure is significantly deteriorated as compared with the case where there is no opening end portion.

Therefore, in the double skin structure 1 according to the present invention, noise is reduced without impairing good air permeability in the ventilation space 100. Next, the principle of noise reduction will be described in the double skin structure 1 according to the present invention.

FIG. 2 is a diagram showing only the inner space in the ventilation space 100. Hereinafter, in the ventilation space 100 according to the embodiment in the present specification, the noise source exists on the upstream side (lower side of the building, lower floor side), and the noise from the noise source is on the downstream side (upper side of the building, The explanation will be given by taking as an example the propagation to the upper floor side).

When noise propagates inside a passage such as the ventilation space 100, if the dimensional cross section (plane perpendicular to the noise propagation direction) of the ventilation space 100 is less than half the wavelength of the noise, the noise travels through the pipeline. Propagates one-dimensionally as a plane wave.

In the double-skin structure 1 according to the present invention, in the ventilation space 100, it is assumed that the surfaces of the outer member 4 and the inner member 5 forming the ventilation space 100 are in an acoustically "soft" state. ..

As shown in FIG. 2, when the wall surface facing the inside of the ventilation space 100 is acoustically "soft", that is, when the acoustic impedance ratio Z on the surface of the wall surface is 0, the noise propagated from the upstream side is upstream. It is known that it is reflected to the side and does not propagate to the downstream side.

In the prior art (for example, the techniques described in Japanese Patent No. 3831263 and Japanese Patent No. 5454369), the tube mouth of the acoustic tube is at a frequency equal to 1/4 wavelength and an odd multiple frequency thereof. It is utilized that the acoustic impedance ratio Z in is 0.

In contrast to the above-mentioned prior art, the double-skin structure 1 according to the present invention utilizes a resonator 10 in which a resonance phenomenon occurs due to a slit structure having a cavity sealed behind as shown in FIG. FIG. 3A is a perspective view of the resonator 10. Further, FIG. 3 (B) is a cross-sectional view of the slit-shaped opening 50 of the resonator 10 of FIG. 3 (A) as viewed by cutting it vertically in the longitudinal direction.

As shown in FIG. 3, the resonator 10 used in the double-skin structure 1 according to the present invention is basically composed of a square columnar housing 40 having a hollow inner space. On one surface of the housing 40 constituting the resonator 10, a longitudinal slit-shaped opening 50 and a partition wall portion 60 arranged on both sides of the slit-shaped opening 50 and extending into the space inside the resonator 10 And, it is characterized by having. Here, each dimension of the resonator 10 is represented by a symbol shown in FIG. One surface of the housing 40 in which the slit-shaped opening 50 is formed and the partition wall 60 are orthogonal to each other.

When each dimension of the resonator 10 is sufficiently small with respect to the wavelength, the acoustic impedance ratio Z in the slit-shaped opening 50 can be obtained by the following equation (1).

However, f is the frequency of noise, c is the speed of sound, and ρ is the density of the medium (air). Further, V _n is the volume of the space other than the shaded portion in FIG. 2B surrounded by the slit-shaped opening 50 and the partition wall 60, and is calculated by the following equation (2) in consideration of the opening end correction. Will be done. The second term in [] in the equation (2) is a term related to end correction. Further, the space in the shaded area in FIG. 3B corresponds to the air layer of the resonator 10 that functions as a resonator.

Further, V is the volume of the cavity of the resonator 10 (volume of the air layer) and is calculated by the following equation (3).

Further, S is the area of the slit-shaped opening 50 (slit opening) and is calculated by the following equation (4).

The first term r on the right side of the equation (1) is an acoustic resistance such as friction generated between the surface of the partition wall 60 of the resonator 10 functioning as a resonator and the air. When the partition wall 60 is made of a material having a smooth surface such as metal, the acoustic resistance r becomes an extremely small value, and the acoustic impedance ratio Z at the opening of the slit-shaped opening 50 is almost 0 at the resonance frequency f satisfying the following equation. Become.

As shown in FIG. 4, when two resonators 10 functioning as such resonators are arranged to face each other along the upper and lower inner walls 105 of the ventilation space 100, the slit portions facing each other sound at the above frequency f. In a "soft" state, the noise of frequency f propagating from the upstream side is reflected to the upstream side and does not propagate to the downstream side.

FIG. 4 is a diagram showing a double-skin structure 1 according to an embodiment of the present invention. FIG. 4A is a perspective view of the double-skin structure 1 according to the present invention in which the resonator 10 is applied to the ventilation space 100, and the double-skin structure 1 of FIG. 4B is horizontal to the ventilation space 100. It is sectional drawing which cut in the direction (or the longitudinal direction of the slit-shaped opening 50) vertically.

According to the double-skin structure 1 of the ventilation space 100 as shown in FIG. 4, at the resonance frequency of the resonator 10, the acoustic impedance ratio in the slit-shaped opening 50 of the opposed resonator 10 becomes almost 0, and the lower side of the building. The noise incident from (lower floor side) is reflected downward and does not propagate to the upper side (upper floor side) of the building.

Next, the manufacturing process of the resonator 10 constituting the double-skin structure 1 will be described. FIG. 5 is a diagram illustrating an example of a manufacturing process of the resonator 10 used in the double skin structure 1 according to the embodiment of the present invention.

The outer shell member 20 is a rectangular parallelepiped-shaped box-shaped member in which one of the six surfaces is an opening surface 25. The L-shaped member 30 is a member having an L-shaped cross section and having two surfaces orthogonal to each other.

As shown in FIG. 5, the resonator 10 can be manufactured by attaching two L-shaped members 30 as described above to the opening surface 25 of the outer shell member 20.

The distance between the two L-shaped members 30 attached to the opening surface 25 of the outer shell member 20 is the slit-shaped opening 50. Further, one of the two surfaces of the L-shaped member 30 functions as a partition wall portion 60 of the resonator 10.

In the manufacturing method of the resonator 10 as described above, by preparing the outer shell member 20 and the L-shaped member 30 having various dimensions in advance, the double skin structure 1 capable of easily changing the frequency to be reduced is configured. It becomes possible to do.

As described above, in the double-skin structure 1 according to the present invention, the resonator 10 having the slit-shaped opening 50 having an acoustic impedance ratio of 0 is formed on the inner surface (outer member 4 and inner member 5) of the ventilation space 100 of the building. Since the slit-shaped openings 50 are arranged in pairs so as to face each other on the surface), according to the double-skin structure 1 according to the present invention, the type of constituent member is as the double-skin structure 1 in the ventilation space 100. And the number can be reduced, the structure can be simplified, the device can be made smaller and lighter, and the manufacturing and assembling costs can be suppressed.

Further, according to the double-skin structure 1 according to the present invention, it is possible to prevent the open end of the ventilation space 100 from being sound-insulated, and to improve the sound-insulating performance of the exterior wall having the double-skin structure. At this time, the introduction of outside air into the ventilation space 100 and the flow of air can be maintained.

Further, according to the double-skin structure 1 according to the present invention, since the resonator is a long body having the same cross section, it is easy to manufacture and install, and the cost associated with the increase in manufacturing, transportation, and construction man-hours can be reduced. Can be done.

Next, other embodiments of the present invention will be described. FIG. 6 is a diagram showing a double skin structure 1 according to another embodiment of the present invention. FIG. 6 is a cross-sectional view of the double-skin structure 1 of FIG. 6 as viewed by vertically cutting the longitudinal direction of the ventilation space 100 (or the longitudinal direction of the slit-shaped opening 50).

FIG. 6A shows a structure in which the resonator 10 is embedded in both the outer member 4 and the inner member 5 constituting the double skin structure 1. Further, FIG. 6B shows a structure in which the resonator 10 is embedded in either the outer member 4 or the inner member 5 constituting the double skin structure 1. (FIG. 6B shows an example in which the resonator 10 is embedded only in the outer member 4 and the resonator 10 is fixed to the inner member 5.)
Also in the present embodiment, as shown in FIG. 6, in the ventilation space 100 of the double skin structure 1, the resonators 10 are arranged in pairs so that the slit-shaped openings 50 of the two resonators 10 face each other. ing.

According to such an embodiment, it is possible to enjoy the same effect as that of the previous embodiment, and it is possible to effectively utilize the space between the interior wall 110 and the exterior wall 120.

Next, other embodiments of the present invention will be described. FIG. 7 is a diagram showing a double-skin structure 1 according to another embodiment of the present invention. FIG. 7 shows a pair of resonators 10 facing each other extracted from the ventilation space 100 of the double skin structure 1. Further, in FIG. 7, the partition wall portion 60 is not shown because the drawing becomes complicated.

In the embodiment shown in FIG. 7, a three-part partition plate member 70 is provided between the resonators 10 facing each other, and the resonator 10 is provided in the first compartment 11, the second compartment 12, the third compartment 13, and the fourth compartment 14. It is divided into four sections. Here, in the present embodiment, the resonator 10 is divided into four compartments, but the number of compartments the resonator 10 is divided into is arbitrary. Further, providing such a partition plate member 70 to divide the resonator 10 can be applied to other than the embodiment shown in FIG.

When the opening of the ventilation space 100 is provided on the wall surface so as to be longitudinal with respect to the horizontal direction, especially in a situation where noise from the outside is incident on the wall surface at an angle in the horizontal direction with respect to the wall surface, the inside of the ventilation space 100 path is one-dimensional. It is also possible that it does not propagate in a targeted manner.

In such a case, as shown in FIG. 7, by providing the partition plate member 70 in the opening and in the resonator 10 to be incorporated, the noise propagates one-dimensionally in the ventilation space 100, and the noise generated by the resonator 10 is generated. The reduction is effective.

The interval at which the partition plate member 70 is provided is preferably 1/2 or less of the wavelength of the noise to be reduced.

Further, when the noise to be reduced by the double skin structure 1 has a plurality of peak frequencies in the frequency characteristics or has a frequency component in a wide band, the interval between the partition plate members 70 and the like is set. It is also one of the preferable embodiments that the resonator 10 is set differently and has compartments having different lengths in the horizontal direction.

As described above, in the double-skin structure 1 according to the present invention, a resonator having a slit portion having an acoustic impedance ratio of 0 is paired so that the slit-shaped opening faces the wall surface of the inner wall of the noise propagation path, for example. Therefore, according to the double-skin structure 1 according to the present invention, the types and number of constituent members can be reduced as the double-skin structure 1 in the ventilation space 100, the structure can be simplified, the device can be downsized, and the like. It is possible to reduce the weight and reduce the manufacturing and assembling costs.

Next, other embodiments of the present invention will be described. The resonator 10 according to the embodiment described so far exhibits a noise reduction effect at the resonance frequency f determined by the equation (5). The resonance frequency f can be adjusted to the frequency characteristics of noise by adjusting the dimensions A, B, C, a, and l shown in FIG.

However, if the target noise to be reduced by the resonator 10 has a plurality of peak frequencies in the frequency characteristics or has frequency components in a wide band, it is necessary to combine the resonators 10 having different resonance frequencies. There is.

Therefore, in the double-skin structure 1 according to another embodiment, the device having a plurality of resonance frequencies is composed of simple and few members. More specifically, in the double-skin structure 1 according to the present embodiment, the resonator 10 has a rectangular parallelepiped outer shell member 20 (similar to that described above) having one open surface and a single plate shape. It is composed of a partition plate member 35 and an L-shaped member 30 having different dimensions (similar to that described above).

FIG. 8 is a diagram illustrating a resonator 10 used in the double skin structure 1 according to another embodiment of the present invention.

FIG. 8A is an exploded perspective view of the double skin structure 1 according to another embodiment. Further, FIG. 8B is a perspective view of the double skin structure 1 according to another embodiment. Further, in FIG. 8C, the ventilation space 100 to which the double skin structure 1 is attached to another embodiment is cut vertically in the longitudinal direction of the ventilation space 100 (or the longitudinal direction of the slit-shaped opening 50). It is a cross-sectional view as seen.

As shown in FIGS. 8A and 8B, by attaching two L-shaped members 30 as described above and one partition plate member 35 to the opening surface 25 of the outer shell member 20. , It is possible to manufacture the resonator 10. In this case, the partition plate member 35 also functions as a partition wall portion 60.

By combining the outer shell member 20, the L-shaped member 30, and the partition plate member 35 as shown in FIG. 8, two slit resonators having space A and space B can be configured in one resonator. .. In each of the resonators, _{the acoustic impedance ratio Z of the slit portion 50 becomes almost 0 at the respective resonance frequencies f 1} and f ₂ , and these are arranged to face each other on the inner surface of the ventilation space 100 as shown in FIG. 8 (C). As a result, the noise reduction effect is exhibited for multiple frequencies.

The double-skin structure 1 according to the other embodiment as described above can be variously provided by using the outer shell member 20 and the partition plate member 35 having the same dimensions by changing the position of the partition plate member 35 and the dimensions of the L-shaped member 30. A resonator 10 having a resonance frequency can be configured.

An underscore is added in the drawing for "space" such as space A and space B.

FIG. 9 is a diagram showing a double-skin structure 1 according to another embodiment of the present invention. FIG. 9 is a cross-sectional view of the ventilation space 100 cut vertically (or the longitudinal direction of the slit-shaped opening 50).

As shown in FIG. 9, by increasing the number of the partition plate member 35 and the L-shaped member 30, three slit resonators having the space A, the space B, and the space C can be formed, and one outer shell member 20 can be formed. It is possible to construct a resonator 10 having three or more different resonance frequencies in the room. In this case, the partition plate member 35 also functions as a partition wall portion 60.

Further, FIG. 10 is a cross-sectional view when the double skin structure 1 according to another embodiment of the present invention is applied to the ventilation space 100. FIG. 10 is a cross-sectional view of the ventilation space 100 cut vertically (or the longitudinal direction of the slit-shaped opening 50).

In the double skin structure 1 according to another embodiment of FIG. 10, the resonator 10 is two resonators consisting of the space A and the space C is separated by the partition plate member 35 of the two spaced intervals a _t construction It has become. In this case, the slit between the two resonators is a slit-shaped opening 50 having no air layer behind. In this case, the partition plate member 35 also functions as a partition wall portion 60.

If placed opposite such resonator 10 along the inner wall of the ventilation space 100, with respect to the frequency interval a _t the cross-sectional dimensions and the partition plate member 35 of the ventilation space 100 is equal to or less than a half wavelength, an air layer behind The slit-shaped opening 50 having no shape functions as an acoustic tube (space B).

In this case, the dimension D of the outer shell member 20 corresponds to the pipe length of the acoustic tube, in the frequency f _t and its odd multiples of a frequency 1/4 is equal to D of wavelength, acoustic slit opening 50 of the acoustic tube The impedance ratio Z becomes 0, and the noise reduction effect is exhibited.

Generally, the above _{ft has a frequency higher than the resonance frequency f 1} or f ₂ of the slit resonator (space A and space C in FIG. 9), so that the structure is a combination of the slit resonator and the acoustic tube as shown in FIG. The double-skin structure 1 by the resonator 10 can exhibit a noise reduction effect over a wide range of frequencies.

Incidentally, Again, spacing a _t the cross-sectional dimensions and the partition plate of the ventilation space for frequencies equal to or less than the half wavelength, the slit having no air layer behind serves as an acoustic tube. The prior art described in Patent Documents 1 and 2 required a large number of dividers to form an acoustic "tube" with a rectangular cross section. On the other hand, in the present invention, these partition plates are unnecessary.

Next, other embodiments of the present invention will be described. FIG. 11 is a diagram showing a double-skin structure 1 according to another embodiment of the present invention. In the embodiments described so far, by arranging the resonators 10 facing each other on both sides of the ventilation space 100, the inner surface of the ventilation space 100 (the surface of the outer member 4 and the inner member 5) is acoustically "soft". I was trying to make it in a state.

On the other hand, in the present embodiment, an attempt is made to reproduce an acoustically "soft" state by arranging the resonator 10 only on one side of the ventilation space 100. In the double-skin structure 1 according to the present embodiment, FIG. 11 (A) shows the case where the resonator 10 is “one-sided” in the ventilation space 100, and FIG. 11 (B) shows the resonator 10 in the ventilation space 100. The cases of "one-sided parallel arrangement" are shown respectively.

According to the numerical analysis method using the two-dimensional boundary element method, it can be confirmed that the method of "opposing" the resonators 10 is more effective as a noise reduction method than the other arrangement methods, but "one side". When it is found that a sufficient noise reduction effect can be expected for arrangement methods such as "arrangement" and "one-sided parallel arrangement", and only "one-sided arrangement" and "one-sided parallel arrangement" can be adopted due to layout and other reasons. It is also possible to appropriately adopt such an arrangement.

Next, other embodiments of the present invention will be described. FIG. 12 is a diagram illustrating a resonator 10 used in the double skin structure 1 according to another embodiment of the present invention. FIG. 12 (A) shows the resonator 10 used for the double-skin structure 1 according to the embodiment described so far, and FIG. 12 (B) shows the resonator 10 used for the double-skin structure 1 according to the present embodiment. Shown. The double-skin structure 1 according to the present embodiment is characterized in that the resonator 10 shown in FIG. 12B is arranged in the ventilation space 100.

As shown in FIG. 12A, the resonator 10 of the double skin structure 1 according to the embodiment described so far is arranged on both sides of the slit portion 50 and is provided with partition wall portions 60, and these partition wall portions 60 are provided. It had a length of l in the depth direction.

On the other hand, in the present embodiment shown in FIG. 12B, the resonator 10 of the double skin structure 1 has a structure in which the partition walls 60 on both sides of the slit portion 50 are omitted. The partition wall portion 60 is omitted, but instead, the plate thickness on the front surface of the resonator 10 including at least the slit portion 50 has a thickness of l.

_{Due to the plate thickness l, V n} described in the first embodiment is generated also in the resonator 10 used in the present embodiment. As a result, even with the double-skin structure 1 according to the present embodiment in which the resonator 10 in which the partition wall portion 60 is omitted is used, the same effect as that of the double-skin structure 1 described above can be enjoyed.

As described above, in the double-skin structure according to the present invention, a resonator having a slit-shaped opening having an acoustic impedance ratio of 0 is arranged between the outer member and the inner member, and such a present invention. According to the double-skin structure according to the above, it is possible to improve the sound insulation performance of noise propagating in the ventilation space, and it is not necessary to use an expensive member having high sound insulation performance for the inner member, so that the cost can be reduced. become able to.

Further, according to the double-skin structure according to the present invention, it is possible to prevent the open end of the ventilation space from becoming sound-insulating defect and improve the sound-insulating performance of the exterior wall having the double-skin structure. The introduction of outside air into the ventilation space and the flow of air can be maintained.

Further, according to the double-skin structure according to the present invention, since the resonator is a long body having the same cross section, it is easy to manufacture and install, and it is possible to reduce costs associated with an increase in manufacturing, transportation, and construction man-hours. can.

1 ... Double skin structure 4 ... Outer member 5 ... Inner member 10 ... Resonator 11 ... First compartment 12 ... Second compartment 13 ... Third compartment 14 ... Fourth section 20 ... Outer shell member 25 ... Opening surface 30 ... L-shaped member 35 ... Partition plate member 40 ... Housing 50 ... Slit-shaped opening 60 ... Partition 70 ... Partition plate member 100 ... Ventilation space 110 ... Lower opening end

Claims (5)

It is composed of an outer member having a main surface extending in the vertical direction and a horizontal direction, and an inner member provided on the indoor side of the outer member at a predetermined interval and having a surface parallel to the main surface. A double-skin structure in which a lower opening end is arranged below the ventilation space formed between the inner member and an upper opening end is arranged above, and constitutes an outer wall portion of the building.
A double-skin structure characterized in that a resonator having a slit-shaped opening is arranged between the outer member and the inner member so that the slit-shaped opening faces in the horizontal direction. The double-skin structure according to claim 1, wherein a resonator is arranged in each of the outer member and the inner member. The double-skin structure according to claim 1 or 2, wherein the slit-shaped openings of the resonator of the inner member and the outer member are arranged so as to face each other. The invention according to any one of claims 1 to 3, wherein the resonator is arranged on the lower opening end side of the ventilation space formed between the outer member and the inner member. Double skin structure. The double-skin structure according to any one of claims 1 to 4, wherein the resonator is divided into a plurality of sections by a partition plate member.

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