One, characteristic and Application
The induced fan is a part of the airless induced jet ventilation system. It is composed of an air supply fan and an exhaust fan. The principle of the system is designed by a system designed, more than a number of guidance fan nozzle directed high speed air flow, the induction of outdoor air or treated air, under the condition of no wind pipe to the required area, to achieve the best indoor air flow organization, in order to achieve efficient and economical ventilation and ventilation effect. When using no pipe jet to induce ventilation system, the cost of designing, manufacturing and installing the wind pipe and other supporting works can be saved. This part is much more expensive than the induced fan unit used, and the ventilation duct of the ventilation fan and exhaust fan is much smaller than that of the pipe. The wind turbines with high wind volume and lower wind pressure can be used to reduce the required power and greatly reduce operation costs and investment costs. When the exhaust fan stops running, the induced fan can still work and play the role of partial ventilation and ventilation.
The fan is built with high efficiency centrifugal fan, low noise, small size, light weight, convenient hoisting (vertical and horizontal installation) and simple maintenance. It is widely used in underground parking lots, gymnasium, workshop, warehouse, supermarket, supermarket, entertainment and other large area ventilation.
The YDF- type I inducer fan is generally used in the induction ventilation system without wind pipes. There are two types of horizontal and horizontal and horizontal dual use structures. The motor uses a single phase motor for the fan.
YDF- II type induction fan is cabinet structure, horizontal installation and belt drive. The three phase induction motor is usually combined with a spiral air duct and a radially curved nozzle to form an inductive ventilation system with an air duct.
The air quality sensor can be set up in the induced space to detect the concentration of carbon monoxide and control the opening and stopping of the induction fan automatically by the controller to realize automatic control.
Two, the inductive ventilation system has advantages over the traditional duct ventilation system.
1. System planning and design is simple, design change flexibility is big, modification is easy, layout is flexible, the direction of injection can be adjusted at any time and anywhere.
2, easy installation, simple construction, can be installed in targeted locations, eliminate dead ends.
3, maintenance is simple and convenient, single machine maintenance, does not affect the operation of the entire system;
4, high air quality, induction system uses the entire space air circulation completely, without leaving dead ends, improving the air quality;
5. The fan is made of high quality cold rolled plate (super hard aluminum alloy frame), with plastic sprayed surface, beautiful appearance and good coordination with space decoration.
6, the motor adopts a special motor for maintenance free fan, and has built-in high efficiency centrifugal fan. The noise is low, and the impeller is calibrated by high-precision dynamic balance, and the vibration is small.
Three, performance parameters and shape size table

YDF系列性能参数表
型号 No	风量 (m3/h)	出口风速 (m/s)	功率 (w)	射程 (m)	重量 (Kg)	噪声 dB(A)	喷口直径 (mm)
YDF-I-6L	650-850	11-15	100	10	20	50	Φ80*3
YDF-I-6W	650-850	11-15	120	10	20	50	Φ80*3
YDF-I-12	1150-1350	14-24	180	15	35	58	Φ80*3
YDF-Z-2.2	1380	11-16	180	20	45	55	Φ175*1
YDF-II-2.25	2300	风压1300Pa	2200	/	130	80	Φ35*32
YDF-II-2.5	3600	风压1736Pa	3000	/	150	84	Φ35*36
YDF-II-2.8	6000	风压1760Pa	4000	/	180	87	Φ35*60

Four. Shape size and installation of nozzle
(1) schematic diagram of YDF- I -6L vertical induced draft fan (universal spherical nozzle)
The horizontal induction fan of the spherical nozzle is composed of a centrifugal fan, an anechoic box and three universal spherical nozzles. The angle of rotation is <60 degrees, and the nozzle is 80 * 3. Main features: the nozzle position increases 8, can adjust the nozzle position arbitrarily, adapt to the different design and the actual needs of the field, the unit does not change, the fan efficiency is improved.

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