射流（诱导）风机的原理来自于空气动力学中高速喷流的扰动特性，利用喷出带有较高动能的高速气流来诱导及扰拌周围大量空气，并将其带至特定的目标方向。喷流中心速度由喷嘴出口点起逐渐减低，但是喷流宽度逐渐增加,所诱导的周围的空气量也逐渐增加。一方面稀释室内有害气体，另一方面带动室内空气流动，有害气体集中而快速地沿着预设的空气流道行进至排风机处，由排风机排走，从而实现地下车库的良好换气。

The principle of jet (induced) fan comes from the disturbance characteristics of high-speed jet in aerodynamics. It uses the high-speed jet with high kinetic energy to induce and disturb a large amount of surrounding air and bring it to a specific target direction. The jet center velocity decreases gradually from the nozzle outlet point, but the jet width increases gradually, and the induced surrounding air volume also increases gradually. On the one hand, the indoor harmful gas is diluted, on the other hand, the indoor air is driven to flow, and the harmful gas travels to the exhaust fan along the preset air flow channel and is discharged by the exhaust fan, so as to realize good ventilation of the underground garage.

射流(诱导)风机应用于地下车库时，可以有效降低车库内有害气体与烟雾的浓度，保持良好空气，改善车库环境。应用于局部污染环境时，利用高压喷出的气流引导周围的大量气体到指定的方向与区域，从而达到降低废气浓度，提高空气质量的目的。

When the jet (induced) fan is applied to the underground garage, it can effectively reduce the concentration of harmful gas and smoke in the garage, maintain good air and improve the garage environment. When applied to the local polluted environment, the high-pressure jet of air is used to guide a large amount of surrounding gas to the specified direction and area, so as to reduce the concentration of waste gas and improve air quality.

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风机外壳为钢板制成（表面做静电环氧喷涂），扁平体结构，其厚度应保证足够的强度与刚度,足以承受运转产生的动负荷。单进风后倾离心叶轮。驱动方式为直联驱动。风机整体外形为扁平体结构,电机应安装在进风口内以降低车库层高,节省土建成本。风机进风口安装有安全防护网。

The fan shell is made of steel plate (electrostatic epoxy spraying on the surface), flat structure, and its thickness shall ensure sufficient strength and stiffness to bear the dynamic load generated by operation. Single inlet backward inclined centrifugal impeller. The driving mode is direct drive. The overall shape of the fan is a flat structure, and the motor shall be installed in the air inlet to reduce the floor height of the garage and save the civil engineering cost. The air inlet of the fan is equipped with a safety net.

叶轮为铝制后倾离心叶轮,全焊接成形。叶轮经过静态和动态平衡均达到国家等级标准。叶轮处于最高允许转速时，能保持平稳的气流和较低的噪声。叶轮特性应能有效避免因工作点滑动造成的性能下降。风机结构能够允许叶轮方便抽出，方便叶轮维护或清洁。

The impeller is aluminum backward inclined centrifugal impeller, which is fully welded. After static and dynamic balance, the impeller reaches the national level standard. When the impeller is at the maximum allowable speed, it can maintain stable air flow and low noise. The characteristics of the impeller shall effectively avoid the performance degradation caused by the sliding of the working point. The fan structure can allow the impeller to be easily drawn out, which is convenient for impeller maintenance or cleaning.

风机进风口应严格按照空气动力特性设计表面光滑呈流线型以减少紊流提高风机效率，降低噪声。

The air inlet of the fan shall be designed in strict accordance with the aerodynamic characteristics, and the surface shall be smooth and streamlined to reduce turbulence, improve fan efficiency and reduce noise.

风机配外转子(EC)电机，工作环境温度范围（-25︒C ~50︒C），具有结构紧凑、风量大、静压高、震动小、噪音低、安装方便、节能高效等特点。

The fan is equipped with external rotor (EC) motor, and the working ambient temperature range is (- 25 ︒ C ~ 50 ︒ C). It has the characteristics of compact structure, large air volume, high static pressure, low vibration, low noise, convenient installation, energy saving and high efficiency.