Muffler, air-conditioning equipment Jie Mei specializes in the production, composite muffler kit provided by the United States air-conditioning equipment. Muffler, air-conditioning equipment Jie Mei specializes in the production, composite muffler is a Texas-US-Air Conditioning Equipment Co., Ltd. (www.dzmjkt.com) 2014 upgrade been newly launched Texas-US-Air Conditioning Equipment Co. muffler such a good high-frequency noise the effect of impedance composite muffler silencer, while the low-frequency noise elimination performance is poor. And because of sound-absorbing material of high temperature exhaust gas discharged from the engine easily melted, so life is short composite muffler, and easily deposits, sludge and other reduced or lost silencer blocking effect, it is rarely used a single resistive motorcycle muffler. Shandong Dezhou America Jie Air Conditioning Equipment Co., Ltd. is a professional production, induced fan, sidewall fans, duct fans, and a series of fans, vents, duct, shock absorbers and other products production and sales of professional manufacturers. Air Conditioning Equipment Co., Texas US-Jie impedance compound: of course is a combination of both structural principle. You can eliminate the high frequency low noise. However, the system requirements with wind resistive * For civilian air conditioning and ventilation systems in general, I think the choice impedance composite * as well. * Has a good resistance in the high-frequency performance muffler. Press the air flow channel geometry of different shapes, can be divided into straight tube, chip, folded plate, labyrinth, cellular, acoustic streaming, barrier plate, elbow-type and so on. * Applicable to eliminate resistance in the low-frequency noise or narrowband noise. Their action principle can be divided into expandable, and interferometric cavity type and other types. Impedance Complex *, there is a resonance chamber, expansion chamber, perforated screens acoustic filter element, a combination of resistive muffler * good high frequency characteristics and low-frequency impedance of * good muffler features, so its anechoic frequency bandwidth, it * One of the most commonly used is the standard series. Suitable wind speed of 6-8 m / sec, up to 8 to 12 meters, can be used alone, can also be used in tandem. Silencing effect: low 10 ~ 15dB / m, IF 15 ~ 25dB / m muffler price, high-frequency 25 ~ 30dB / m, the average drag coefficient is 0.4. According to "air conditioning", silencer elbow, silencer plenum belong * one.