* YDF YDF range abduction air induced fan * Ding Ding positive industrial production for sale and positive industrial YDF range abduction air using a jet inducing ventilation system concept, the air blower, multiple induced fan (or pipe flow induction fan) and the composition of the exhaust fan . YDF range abduction air parking lot, a variety of ventilation equipment warehouse, stadiums and other large workshop space widely used. YDF range abduction air has been used as a conventional underground car park ventilation, and their integration into construction equipment design specifications, is gradually popularize. YDF range abduction air mainly from the use of theoretical aerodynamics, with a small amount of high-speed jets of gas disturbance characteristics. Disturbance jet stream can still effectively induce ambient air, driven by air circulation. In the absence of duct condition that is based on the law of conservation of momentum: center velocity jet stream weakened since the exit point, but gradually increase the width of the jet, the amount of air induced around gradually increasing. According to this principle, a new wind is induced, and to a second mounted within an effective range of the first fan (nozzle), turn down, fresh air is supplied to the necessary area, and finally by the exhaust fan to the outside row. And set up an appropriate system layout for optimum indoor air flow organization, to achieve the same effect of ventilation and efficient economy. Features are as follows: 1. The design is simple and flexible: system planning simple, flexible design changes large, easy to modify, small opportunities for error. 2. Save space: a huge need for a conventional ventilation as complex pipeline, the largest but also 35CM diameter spiral duct; 3. Easy installation: no huge duct, simple construction, easy installation, flexible; installation location targeted use convenience. The new nozzle: the radius of the nozzle can be adjusted universal, free to adjust the jet direction, easy, flexible. 5. Efficiency: the use of physical characteristics of induced air volume, so save electricity, low running costs, equipment, small size, lower installation costs. 6. Easy maintenance: no access door induced fan and filter, the filter is easy to clean, fan maintenance, easy to maintain. 7. High quality ventilation: full flow induced by gas, there will be no dead produce, reduce exhaust gas concentration, to avoid the accumulation of pollution, improve air quality.