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如何选择管道风机
1.管道通风机选用控制参数为风量、全压、效率、噪声、电机功率等。
1. the control parameters of duct fan are air volume, total pressure, efficiency, noise, motor power and so on.
2.依据被保送气体的物理、化学性质，选择不同用处的通风机。如保送清洁空气，应选择普通通风机;保送易燃、易爆气体，应选择防爆通风机;保送腐蚀性气体，应选用耐腐蚀风机。
2. according to the physical and chemical properties of the gas being transported, choose the ventilator with different uses. For delivering clean air, ordinary ventilators should be selected; for delivering flammable and explosive gases, explosion-proof ventilators should be selected; and for delivering corrosive gases, corrosion-resistant ventilators should be selected.
3.通风机选型时，应思索管路系统的漏风损失、计算误差，以及通风机实践风量、风压的负偏向，普通采用风量为1.05～1.1，风压为1.10～1.15的平安系数。但也不采用过大，以避免通风机长期处在低效率区运转。
3. When choosing the type of ventilator, we should consider the air leakage loss of pipeline system, calculation error, and the negative deviation of ventilator practical air volume and air pressure. In general, the safety factor of air volume is 1.05-1.1 and air pressure is 1.10-1.15. But it is not too large to avoid fan running in low efficiency area for a long time.
4.留意管网阻力特性与通风机特性的匹配关系。为使通风机能稳定运转，应使通风机在其最高效率点左近工作,通风机的工作点位于性能曲线中全压峰值点的右侧(即大风量侧，且普通位于全压峰值的80%)。
4. pay attention to the matching relationship between the resistance characteristics of the pipe network and the characteristics of the ventilator. In order to make the ventilator work steadily, it is necessary to make the ventilator work near its maximum efficiency point. The working point of the ventilator is located on the right side of the peak value of total pressure in the performance curve (i.e. the side of high air volume, and generally at 80% of the peak value of total pressure).
5.对有消声请求的通风系统，应首先选择效率高、叶轮圆周速度低的通风机，且使其在最高效率点左近工作。还应依据通风系统产生噪声和振动的传播方式，采取相应的消声和减振措施。
5. For the ventilation system with muffling request, the fan with high efficiency and low impeller circumferential velocity should be selected first, and it should work near the left of the highest efficiency point. According to the transmission mode of noise and vibration produced by ventilation system, the corresponding measures of noise elimination and vibration reduction should be taken.
6.管道通风机是经过对叶片外形的改动，使气流在进入风机后，既有局部轴流作用，又产生局部离心作用，因而其性能介于轴流式风机和离心式风机之间。
6. Pipe ventilator is a kind of fan whose performance is between the axial fan and the centrifugal fan because of the modification of the blade shape and the local axial flow and centrifugal centrifugal effect of the air when it enters the fan.
7.管道通风机能提供中风压和中等风量，这关于目前的大多数高层民用建筑中的通风系统都是较适宜的。
7. Pipe ventilators provide stroke pressure and moderate air volume, which is more suitable for the ventilation system in most high-rise civil buildings at present.
1. the control parameters of duct fan are air volume, total pressure, efficiency, noise, motor power and so on.
2.依据被保送气体的物理、化学性质，选择不同用处的通风机。如保送清洁空气，应选择普通通风机;保送易燃、易爆气体，应选择防爆通风机;保送腐蚀性气体，应选用耐腐蚀风机。
2. according to the physical and chemical properties of the gas being transported, choose the ventilator with different uses. For delivering clean air, ordinary ventilators should be selected; for delivering flammable and explosive gases, explosion-proof ventilators should be selected; and for delivering corrosive gases, corrosion-resistant ventilators should be selected.
3.通风机选型时，应思索管路系统的漏风损失、计算误差，以及通风机实践风量、风压的负偏向，普通采用风量为1.05～1.1，风压为1.10～1.15的平安系数。但也不采用过大，以避免通风机长期处在低效率区运转。
3. When choosing the type of ventilator, we should consider the air leakage loss of pipeline system, calculation error, and the negative deviation of ventilator practical air volume and air pressure. In general, the safety factor of air volume is 1.05-1.1 and air pressure is 1.10-1.15. But it is not too large to avoid fan running in low efficiency area for a long time.
4.留意管网阻力特性与通风机特性的匹配关系。为使通风机能稳定运转，应使通风机在其最高效率点左近工作,通风机的工作点位于性能曲线中全压峰值点的右侧(即大风量侧，且普通位于全压峰值的80%)。
4. pay attention to the matching relationship between the resistance characteristics of the pipe network and the characteristics of the ventilator. In order to make the ventilator work steadily, it is necessary to make the ventilator work near its maximum efficiency point. The working point of the ventilator is located on the right side of the peak value of total pressure in the performance curve (i.e. the side of high air volume, and generally at 80% of the peak value of total pressure).
5.对有消声请求的通风系统，应首先选择效率高、叶轮圆周速度低的通风机，且使其在最高效率点左近工作。还应依据通风系统产生噪声和振动的传播方式，采取相应的消声和减振措施。
5. For the ventilation system with muffling request, the fan with high efficiency and low impeller circumferential velocity should be selected first, and it should work near the left of the highest efficiency point. According to the transmission mode of noise and vibration produced by ventilation system, the corresponding measures of noise elimination and vibration reduction should be taken.
6.管道通风机是经过对叶片外形的改动，使气流在进入风机后，既有局部轴流作用，又产生局部离心作用，因而其性能介于轴流式风机和离心式风机之间。
6. Pipe ventilator is a kind of fan whose performance is between the axial fan and the centrifugal fan because of the modification of the blade shape and the local axial flow and centrifugal centrifugal effect of the air when it enters the fan.
7.管道通风机能提供中风压和中等风量，这关于目前的大多数高层民用建筑中的通风系统都是较适宜的。
7. Pipe ventilators provide stroke pressure and moderate air volume, which is more suitable for the ventilation system in most high-rise civil buildings at present.
