Fire exhaust fan | Yi-air-conditioning (certified) | exhaust fan

 Yi Tong exhaust fan, low noise, known for many years, we were both sound absorption, sound insulation and silencer muffler three aspects to deal with, let's look at the detail of these three steps: First, the acoustic treatment : When a sound wave is incident to the surface, part of the sound energy absorbed by the object to be converted into other forms of energy exhaust fan model, called sound absorption. Sound absorption properties of the material is represented by the absorption coefficient, the absorption coefficient is larger, the better the sound absorption properties of the material. Sound absorption properties of the material and the nature of the material, the structure and the incident angle and the acoustic sound wave frequency. The porous sound-absorbing material of the sound absorbing mechanism is: the interior material has numerous small interconnected pores, when the sound wave is incident to the surface of these materials, and then is incident within these small pores, to cause air movement within the pore, close to hole wall and air fiber surface, due to friction and viscous resistance movement and difficult campaign to make sound energy into heat energy consumed. Good performance of sound-absorbing material to be porous and therefore, between the hole and the hole through each other, and through the holes to be connected to the outside exhaust fan fire, sound waves can enter the interior materials. Second method exhaust fan, acoustic insulation used in the processing of the noise source is closed, the noise control using acoustic enclosures in a small area. When sound waves encounter shield, due to the characteristic impedance of the interface to change exhaust fan maintenance, incident acoustic energy is reflected part, part absorbed, part of the sound can penetrate into the shield continues to spread. Sound insulation properties of materials can be used to represent the sound transmission coefficient. Sound transmission coefficient becomes smaller, the acoustic energy penetrating the fewer the better the insulation properties of the material. Acoustic insulation performance and body structure of the material, the nature and the incident sound wave frequency. Finally, the characteristics of the processing temperature exhaust muffler fan ⒈ excellent high temperature exhaust fan high temperature performance: in accordance with international norms GBJ45-82 rise building fire test standard "measurement, the medium temperature at 400 ℃ conditions of more than 100 minutes of continuous operation west; medium temperature In continuous operation at 100 ℃ 20 hours / times undamaged. ⒉ compact structure, easy installation and cost savings: a unique and special motor built-in cooling system. Axial installation (horizontal, vertical, lifting may be), it stops less. ⒊ one machine: Two-speed design to adapt to peacetime ventilation and fire smoke. ⒋ advanced design, high total pressure efficiency, technology and reasonable, reliable performance. Application: Applications: high-rise buildings, underground garage, tunnels, high-temperature oven and any required emission gas. Fire exhaust fan | Yi-air-conditioning (certified) | exhaust fan is provided by the Texas Air Conditioning Equipment Co., Ltd. Tong Yi. Yi Tong Air Conditioning Equipment Co., Texas (www.yitongkongtiao.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Air conditioning in friendship through leadership with the staff warmly welcome all inquiries negotiations to create friendship through conditioning a better future.