Many different types and forms of resistance muffler, generally based on the geometry of the flow channel, and can be divided into straight tube, piece, folded plate, cellular, labyrinth, acoustic streaming, disc, elbow-type and so on. (1) straight pipe muffler is the simplest structure of a resistive muffler, sound-absorbing material placed directly in the pipe wall, according to the needs of the pipeline can be round or square. Since only one flow channel, the flow is not the case for the use. (2) piece muffler for larger air volume and a larger pipeline situations. Due to the large size of the pipe into a plurality of smaller muffler channel, which can maintain a large gas flow passages, but also increases the perimeter of the air flow passage of the sound-absorbing material, so that it has good silencing effect. (3) folded plate muffler is based on the chip muffler on the increase in the length and curved flow channel, increasing the contact time noise and sound-absorbing material to reduce the direct projection of the high-frequency noise, the increase of the silencing effect, but Compare and chip resistance muffler also increase. Structural features (4) is similar to a cellular chip muffler muffler, but in order to further reduce the passage section of each silencer dimensions, the entire channel is divided into a large plurality of small cellular muffler channel. (5) is a labyrinth muffler muffler on the basis of a straight tube, baffle insert some sound absorption, sound waves continue to bypass by a small chamber to another chamber, thus increasing the muffling effect, especially in the low frequency range, of course, resistance should be increased. Labyrinth muffler airflow rate should not be too high. (6) flow muffler sound like folded plate muffler, just to reduce the resistance, the working channel into sound stream. Low-flow muffler sound resistance, but the structure is more complex, greater difficulty of processing. Shaped like a disc (7) disc muffler having a smaller length, airflow and sound waves through the disc surrounding radiation, adapted to, in some cases, field conditions and the installation space does not allow a long-shaped muffler. (8) The elbow is a flow muffler muffler pipe bending, used for ventilation and air conditioning. Room air intake and exhaust in. What muffler classification and concepts? 1. resistance muffler: by sound-absorbing material to absorb sound and reduce noise, the general micro-perforated plate muffler belongs to this type, is generally used to remove high frequency noise. However, due to structural reasons, at high temperature, high humidity, high speed does not apply. 2. Anti-muffler: by changing the cross-section to the muffler of. We used a silencer plenum is this principle. Generally lower in the low-frequency noise. Of the wind system is no specific requirement. 3. Impedance compound: of course is a combination of both structural principle. You can eliminate the high-frequency low noise. However, the system requirements for wind resistance with muffler. 

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