4-72 centrifugal fan inlet: made whole double inlet centrifugal fan, the fan mounted on the side, parallel to the axial cross-section of the curve to make switching action is smooth airflow into the impeller, and a smaller loss. Texas Horizon Air Conditioning Equipment Co., Ltd. is a design, development, production, construction, service for the integrated enterprise, the enterprise after years of market development and technological innovation FRP centrifugal fan, has formed the basis for the country's economic development continue to provide new technologies the ability of new technology, new materials, new equipment. The company mainly produces: fan series, outlet series, air series, muffler series, casual flow series, valve series, unit series, series of cooling towers, ventilation ducts and winding series, fan coil series, tanks series. Due to limitations centrifugal fan volute shapes and sizes, the flow field in the presence of a large number of spiral vortex and secondary flow, which is caused by the low efficiency centrifugal fan, the main reason for the high noise. Commercial application of computational fluid dynamics software Numeca, for a certain type of centrifugal fan in different conditions made the whole flow field numerical simulation and by comparison of the installation of anti-vortex flow field around the circle, and analyzes the anti-vortex ring impact on the flow field inside the fan, to explore the mechanism of vortex rings to improve performance centrifugal fan. The results showed that: vortex ring for crushing large-scale vortices and reduce rotation strength and improving the internal flow field of centrifugal fan has a good effect. [] _ Benxi centrifugal fan, double inlet centrifugal fan _ Horizon Air conditioning and ventilation equipment provided by Horizon Air conditioning equipment. Welcome to consult the Texas Air Conditioning Equipment Co., Ltd. Hongxin (www.hxktsb.com), be sure to specify when contact is through the "Business Alliance Member" see, thank you! Contact: Yuan Qingxiang