Noise Analysis: When this distance is small, the bit stream and trail changes will have an impact, the blades may also be used as sound barriers, and strengthen the blade near the blade lift pulsation generated column on sound radiation. This effect depends on the lift pulsation-related acoustic wavelength as compared with the size of the blade barrier. Within this ratio is more than 2 frequency range, due to the impact caused by changes in the intensity of radiation is the most significant. Therefore 220v axial fan, when the upstream and downstream of the radiation noise of the blade has the same number of leaves, and the leaves of the two columns of each of the blades on both sides of the source and at the same time constituting a sound barrier with a rotor blade meet, this effect will be stronger. This series of fans for conveying non-flammable non-corrosive gases no significant dust low noise axial fan, ambient temperature must not exceed 60 ℃, widely used in general factories, warehouses, offices, residential ventilation and other occasions. Corrosion axial fan (FT35-11 type) is the use of anti-corrosion materials coated with epoxy paint from the processing of T35-11-type fan, the motor uses special anti-corrosion motor, for the transport of corrosive gases. Wall axial fans, Chengde axial fans, air conditioning service provided by Chen Yu Chen Yu Wu City Air Conditioning Equipment Co., Ltd .. Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. (www.wccykt.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chenyu air conditioning and you hand into the brilliant, for a better future!