KR830000318Y1 - Acoustic and Thermal Isolators - Google Patents

Abstract

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Description

Acoustic and Thermal Isolators

Figure 1: A partial cross-sectional view of an embodiment of the present invention.

Figure 2: A variant of the device of Figure 1 showing a device with a medium so that no two glass plates touch the second air layer.

Figure 3: Some cross-sectional top view of Figure 2.

Figure 4: Front view of an intermediate glass plate with air passages at four corners to allow air to flow between the two air layers.

Figure 5: Graphical representation of the change in acoustic transmission loss (dB) versus frequency (Hz) of the sound wave when the first air layer is installed toward the sound source (actual test value)

Figure 6: Graphical representation of the change in acoustic transmission loss (dB) versus frequency (Hz) of the sound wave when the second air layer is installed towards the sound source (actual test value).

Figure 7: Comparison of the blocking effect between the two conventional devices and the present invention with actual experimental results.

The present invention relates to a sound and heat shield device having several layers of glass and an air layer therebetween. In particular, the device has a high acoustic transmission loss and prevents dew formation. It is an improved device that can maintain and prevent the formation of Newton rings by maintaining the distance between glass plates.

Various devices have been devised in the past to block sound or heat. For example, it consists of three layers of glass plates, forming a relatively wide air layer between adjacent glass plates, and putting a desiccant in each air layer to block high-frequency sound or heat. They were installed in parallel at intervals to create an air layer between them, and to apply an adhesive around the air layer to absorb incident sound. In addition, it consists of three glass plates to block heat radiation by changing the gap between the plates differently. It consists of four glass plates to keep the gap between the two glass plates inside and an air drying agent. There is also a device to maintain a narrow gap with the glass plate of the band. In addition, there are various devices including two or more glass plates to prevent sound transmission due to the difference in vibration between the plates and the plates, but all of the disadvantages listed below cannot be avoided. In other words, in the first device, a separate desiccant must be added to each air layer without a connection path between air layers. In addition, the thickness of the air layer must be small, especially in order to block sound waves with a small frequency or to seal the air layer completely with the adhesive. However, in the above-mentioned conventional apparatus, when the air layer is small for structural reasons, air drying is impossible. In addition, as the air layer becomes smaller, the outer sides of the yui plates on both sides are deformed by wind or the like, thereby narrowing the gap between the glass plates, resulting in a Newton ring phenomenon.

In the present design, all these drawbacks are addressed and the following points are taken into account.

end. In particular, it blocks the sound of low frequency and effectively insulates the heat to prevent condensation caused by temperature difference between inside and outside of the glass plate.

I. A relatively wide first air layer and a slightly smaller second air layer containing an air drying agent are formed to allow air to circulate between the two air layers.

All. By installing a device that can maintain the two glass plates on both sides of the second air layer at a certain distance to eliminate the Newton ring phenomenon caused by the deformation of the glass plate by the force of the wind.

la. Drying between two air layers by installing several perforated glass plates in the middle Air freely circulates to insulate, preventing condensation in any weather.

As shown in Fig. 1, the device is composed of glass plates of different thicknesses, and Fig. 1 is a picture of the device installed in the building. Here, a relatively large first air layer is arranged in the direction of inlet of sound, ie noise. The outer plate 2 is 3 mm thick and is 6 mm apart from the intermediate plate 3 of 5 mm thickness, and a first air layer 5 is formed between the thick plates. In addition, the inner plate 4 having a thickness of 3 mm apart from the intermediate plate 3 by 0.2 mm to 0.5 mm is provided, where the second air layer 6 is formed. As shown in the figure, in the first air layer, a gap retention zone 10 containing a desiccant 9 is provided. Along the periphery of the glass plate, the space between the spacer 10 and the glass plates 2, 3 was treated with an adhesive agent to seal between the spacer 10 and the glass plate. As shown in Fig. 4, four holes 13 are provided in the intermediate plate 3 so that air between the first air layer and the second air layer circulates. The number of holes can be arbitrarily adjusted according to circumstances. The periphery of the second air layer 6 between the plate 3 and the plate 4 is also sealed to the outside air with the adhesive agent 14. As shown in Figures 1,2 and 3, the edges of the plate (3) and the plate (4) are cut to be inclined to help close contact.

The desiccant 9 of the gap holding mechanism 10 is made of synthetic zorite, which can absorb moisture in the air of 0.1 ppm or less, and passes the dry air between the two air layers through the hole 13 formed in the intermediate plate 3. Circulate in In Fig. 1, the glass plate (2) is placed in the direction of the sound source, and in Fig. 2, the plate (4) is in the direction of the sound source. In Fig. 1 and 2, the second air layer is very small (the distance between the plate and the plate is 0.2-0.5mm), and in this case, the glass plate 4 may be deformed by the force of the wind and contact with the plate 3, Newton ring phenomenon occurs due to and coming into the plate (4). There is no special device to prevent this Newtoning phenomenon in the device of Figure 1, but the strength increases to 1.5 times the force that the glass plates 3 and 4 can withstand by the dry air circulated in the first and second air layers.

In order to prevent the Newton ring phenomenon, the apparatus shown in Fig. 2 is specially equipped in the second air layer 6. That is, several tapes or wires extend in the air layer 6, and both ends are fixed with an adhesive agent. These are piano wires and synthetic resins, which have very small diameters and thicknesses, and are fixed with an adhesive agent between the glass plate materials 3 and 4, but do not come into contact with the plate material. The number of wire rods can be adjusted arbitrarily. The adhesive material is flexible, such as butyl rubber, so that the air layers 5 and 6 can be sealed with the outside, and thus the glass plate is not broken or cracked due to expansion due to temperature difference.

For the thickness of the glass plate or the air layer in the present invention, it is not necessary to use the values exemplified in the present invention. In other words, it can be adjusted appropriately to effectively block low frequency noise between 125Hz and 500Hz.

In Figure 5, when the first air layer faces the sound source (in which the noise comes in); In Fig. 6, the acoustic transfer loss (noise reduction effect dB) with respect to the frequency (Hz) when the second air layer faces the sound source is shown as an experimental value. The following table shows the results of experiments comparing the acoustic transmission loss dB between 100Hz and 5000Hz with the present invention and the conventional device, and is also shown in the graph in Figure 7.

*: Air layer (1) and (2): Inventive design (3) and (4): Conventional apparatus

As shown in the table, the sound transmission loss (noise reduction effect) is averaged 27dB between 125Hz and 500Hz in the range of the present invention, but it can be seen that one glass sheet is 26dB and two sheets are 24dB. It is easy to see the difference between the range of 315Hz to 5000Hz by noting that the present invention is 32dB and 30dB, respectively.

As can be easily seen from the description so far, the present invention allows the dry air to circulate between the two air layers, which brings about a large thermal insulation effect and prevents condensation on the glass surface, and effectively absorbs sound transmission through the second air layer. . The Newton ring phenomenon caused by the glass plate being deformed by contact with the glass plate due to the wind is also prevented by the dry air circulated in the second air layer between the glass plates, and can have a better resistance by installing a piano wire or the like. When the glass plate of Figure 1 is 3mm (outer plate) -5mm (air layer) -3mm (intermediate plate), condensation is prevented up to -49 ℃ and condensation is prevented even at -65 ℃ for 5mm-6mm-5mm. .

Although not described in this description, it is added that various modified devices may be produced by applying the basic principles and properties of the present invention.

Claims (1)

In a sound and heat shielding device comprising a plurality of glass plates having different thicknesses arranged in parallel to each other to form a sealed air layer at a predetermined interval therebetween, wherein the three glass plates have a relatively wide first enclosed air layer and an extremely narrow first layer. 2 forming a sealed air layer and providing a through hole between the first and second sealed air layers, and contact preventing means for preventing the formation of a new Uton ring in the second sealed air layer. Blocking device.