SU937660A1 - Construction element with ventilation cavity - Google Patents

Description

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The invention relates to building structures, namely to building elements with a ventilation cavity, for example, wall panels, and can be used in the construction of buildings in areas with elevated noise levels, in particular near traffic arteries.

A building element is known with a ventilation cavity provided with partitions forming a duct. In order to increase the attenuation of the sound passing from the street through the duct, there are holes in the partitions that are offset from the holes in the adjacent partitions and openings formed in the walls of the building element bounding the cavity 11.

However, this device does not provide the necessary efficiency in the entire normalized frequency band.

A device for silencing a noise, made with a sound labyrinth, whose stanits are enclosed in a C2 contour frame, is known. However, such a device effectively muffles high-frequency sound waves.,

The closest in technical essence to the invention is

to a building element with a ventilation cavity, having an inlet and outlet openings in the walls bounding the cavity, and equipped with a noise muffler cassette with partitions installed in the cavity Gz1-.

Claims (3)

In a known device, a panel is installed at the ends of the partitions, covered with fiberglass. The thickness of the panel (perforation step), as well as the resistance to blowing glass fiber, require experimental selection. The purpose of the invention is to increase the efficiency of ventilation and sound attenuation, as well as reduce the cost. The goal is achieved by the fact that in a building element with a ventilation cavity having inlet and outlet openings in the walls bounding the cavity, and equipped with a noise-attenuating cartridge with partitions installed in the cavity, the cartridge is installed in plan at an angle to the walls with the formation between the latter and the edges of the partitions of the chambers in front of the inlet and outlet openings, the partitions in the cassette being mounted horizontally with the formation of a slotted air duct communicating with the chambers. In addition, in order to provide the possibility of changing the duct cross-section, the cassette is provided with calibrated gaskets placed between the partitions. FIG. 1 shows a building element, view from the side of a ventilated room with a partially removed front panel; FIG. 2 is a horizontal section through a building element. In the building element, for example, wall panel 1, next to opening 2, a ventilation cavity 3 is bled out. A ventilation cavity is provided with a body k and a sound-attenuating cassette 5 with partitions 6 forming a slit-like air duct. at an angle to the walls 9 and 10 of the housing C in such a way that the ends of its partitions, together with the walls 9 and 10, form chambers 11 and 12. Chamber 11 has an inlet opening 13, and chamber 12 has an outlet opening 1. Between partitions 6, they are sound-proof cartridges placed cal brovannye gasket 15, at the inlet T mounted door 16. For placing the ventilation opening 1b of the door, air passes through the inlet 13, chamber 11, a slit-shaped duct 7, whose cross section zadaots kalibrovochnr1h gasket 15, the thickness of chamber 12 and the outlet 1A. : Sound attenuation occurs due to the following factors. After the inlet 13, there is a chamber 11 and a slit-like duct 7. The abrupt change in the cross section creates resistance to the passage of the sound wave, Partitions 6, separated by calibrated ones. gaskets 15, form a slit-like duct with sound-absorbing walls. Sound attenuation occurs due to energy loss due to the presence of a sound-absorbing wall, dissipation in gas and friction along the surface of the structure. The transition from the slit-like duct into the chamber and further into the outlet 1 cause additional resistance to the sound wave. The proposed construction element is simple to manufacture, convenient in operation, has a high noise suppression efficiency while providing the necessary ventilation. The proposed design makes it easy to assemble and dismantle the noise-reducing cassette for cleaning the air duct from contamination, and the presence of calibrated gaskets allows changing the cross-section of the air duct. The selected position of the noise-attenuating cassette and, accordingly, the shape of the chambers 11 and .12 allows optimal use of the volume of the ventilation cavity. Economic calculations have shown that the proposed design is cheaper than the known by 20. Formula of the invention A building element with a ventilation cavity having an inlet and an outlet in the walls defining the cavity and provided with a sound-absorbing cassette with partitions installed in the cavity is about; t l and h In order to increase the efficiency of ventilation and sound attenuation, as well as reduce the cost, the cassette is installed in plan at an angle to the walls with the formation of cameras between the last and edges of the partitions of the chambers outlets and outlets, with the partitions in the cassette mounted horizontally to form a slotted air duct communicating with the chambers. 2. The element according to claim 1, i.e., I distinguish the fact that, in order to enable the duct section to be changed, the cassette is provided with calibrated pads placed between the partitions. 59376606 Sources of information, 2. USSR author's certificate taken into account in the examination number 32bZ (, class E About B 5/20, 1969. 1. USSR author's certificate 3. ABTopckoe USSR certificate ff45 “326, cl. E Oi C 2A6, 1975. No. 75766, Cl, EOitC 2A6, 1978 (Prototype I. I. I I, 1. one . it I I 1 . Phie.1