Production muffler blinds | blinds muffler | muffler blinds Contents 1 Overview 2 structure 3 Features 4 Performance Specifications 5 6 7 Test Applications 1 Overview Pinyin: xiāo shēnɡ bǎi yè English: silencing shutter blinds known as Venetian muffler muffler or eliminate the sound of shutters. Venetian muffler is actually a length (0.2 ~ 0.6m) a short piece or folded plate muffler modification. That allows airflow through the window structure to eliminate noise, due to the structure of the material used in all high-quality aluminum alloy, combined with a special processing technology, making the muffler blinds can be used in any weather conditions, and the airflow resistance, large silencer beautiful appearance, can cater decorative windows. Its length (or thickness) is very small, there is a certain effect silencer and airflow resistance and small, can be combined with a ventilation window, shutters can be assembled into a massive whole. Venetian muffler muffler is generally 5 ~ 15dB (A), was in the high-frequency characteristics of the muffler, muffler performance louvered muffler is mainly determined by the form of a monolithic blinds, blinds spacing, mounting angle and the effective length of the muffler and other factors . Ventilation louvers muffler structure, can eliminate the noise window structure, based on the use of environmental needs of stainless steel, high-quality aluminum, galvanized steel and other high-quality materials, combined with special processing technology, used under any weather conditions and air resistance, muffler volume, appearance, can cater decorative window; can be processed into single or double, sizes can modulus size composition series standard, louver setting reasonable noise attenuation radiation, micro blade side sound absorption resonance hole piston body absorb noise. Muffler wide band, to meet ventilation, lighting, building envelope and noise control requirements for external radiation. Two hundred leaves oval structure design, ventilation resistance, water proof before the leaves, the lower blade can only effectively absorb noise; and with fire, rain, moisture, nice features. Which muffler is 5-15dB (A), the pressure loss ≤30Pa, per square meter used in flow 1500m3 / h ~ 3000m3 / h. Secondary oxidation coating all aluminum construction with stainless steel, galvanized steel material. Rain, fire used in any weather conditions. Airfoil blade muffler can minimize airflow resistance and reduced noise transfer. Modulo assembled into a series of standard size of acoustic louvers. Painted in different colors according to need in an anechoic coating outside louvers. Installation is simple and easy. 3 Features ◆ only 100 or 150 mm thick Easy installation ◆ ◆ ◆ pressure loss and ventilation muffler combo ◆ ◆ rugged galvanized steel structures can be made of stainless steel or other materials ◆ all octave bands have good noise attenuation performance ---- 9 db attenuation of voices ◆ Standard specifications can easily become a large-scale wall louvers can choose a variety of colors ◆ ◆ air acoustics laboratory according to the special requirements of 4 specification will increase or decrease the required height (modulo according to number 150 mm) to increase or decrease the length (modulo 1200 mm), the blinds can be applied to single-muffler (300 mm), double-layer or multi-layer, if used outdoors should be increased rain shutters (110 mm). There are two major specifications: A mainly composed of the top plate, the positioning cord, rope, and the steering mechanism consisting of the movable leaf acoustic louvers, characterized in that the moving blades are sandwich-type, between the interlayer inlaid with anechoic material. Is a not only ventilation, adjustable brightness lighting, and both improved soundproofing acoustic louvers, muffler functions. A ventilating louvers silencers including the border, one hundred blades, frame by side of the border, the top border, the bottom border constitution, which is special because: side of the border and the top border, the bottom border, one hundred blades coupled with screws or rivets. As a result of this structure, can effectively prevent the deformation side of the border, the top border, the bottom border, and hundreds of blades. Therefore, it can effectively prevent the top border, the bottom border, and both sides of the border louver deformation. 5 Test acoustic louvers acoustic performance by an independent testing laboratory determination, according to the American standard "ASTM E336-67T", A2.3 Day "under non-laboratory conditions pass through the loss of test steps." Test procedure prescribed amount is the difference between the sound pressure level of noise in the reverberation room with free field conditions, according to the standard, the propagation loss is equal to the free-field noise minus 6dB (A). 6 Performance 1, designed to: easy to install, can be used in a limited space, in very broad working environment with excellent performance and low muffler noise regeneration. 2, acoustic louvers from ventilation louvres installed in a metal frame built ventilation louvres sound-absorbing materials, ventilation gap is left between the blades. Opening area has been carefully designed to maximize air flow and the best muffler features. 3, streamlined all have lower resistance. 4, acoustic louvers integrated: a low pressure drop and excellent silencer two kinds of properties. 5, acoustic louvers galvanized iron or aluminum, as well as the internal filling of non-combustible sound-absorbing material to ensure its longevity and easy maintenance. 6, the acoustical performance and reliable performance of the product gas stream, and provides the test results independent experiments. 7, acoustic and aerodynamic performance: single muffler muffler blinds A static sound level 14dB; double silencer muffler blinds A static sound level 20dB; when the flow rate of air flow through the blinds of not more than double silencer 5m / s resistance loss less than 30Pa; muffler shutters frame made of high quality galvanized steel production, built-in silencer baffles; muffler deflector glass wool cavity filling, covered with fiberglass cloth and ∮3.8mm orifice; according to different working conditions can be divided muffler blinds thickness 300mm, 400mm, 600mm, 800mm, 1000mm, 1200mm; muffler: venetian muffler muffler is typically 5 ~ 15dB (A), was in the high-frequency characteristics of the muffler, louvered Performance silencer muffler is mainly determined by the form of a monolithic blinds, blinds spacing, mounting angle and the effective length of the muffler and other factors. 7 Applications 1, commercial buildings and industrial plants are required to consider the large flow of air flow, which is used to cool the air supplied to the compressor or the engine, and for ventilation and air conditioning systems. 2. In many ventilation systems, the device generates airflow into the issue with a strong noise problems faced by designers and engineers is necessary to allow air circulation, while also preventing noise propagation to the outside. In particular, the requirements of lower pressure drop and efficient noise prevention requirements are very important evaluation criteria. While also taking into account the requirements of the architect will be economic, aesthetic and practical. 3, factory floor ventilation and cooling tower air inlet, compressor room, power stations, substations, exhaust chamber, diesel group room, parking rooms, air conditioning units, natural ventilation area, condensing units air intake, exhaust into the equipment room window, strong noise equipment acoustic cover ventilation windows, vents local noise barrier.