济南通风管道设备种类有很多，今天小编想跟大家讲一下其中两个，一个是轴流风机，另一个是离心风机。这两种都是在工业领域或者是工程当中常用的机械，它们的使用范围也很广。今天，小编带大家一起了解一下，这两种风机设备的区别在哪里。
There are many kinds of ventilation duct equipment in Jinan. Today, I would like to tell you about two of them, one is axial flow fan, the other is centrifugal fan. These two kinds of machinery are commonly used in the industrial field or engineering, and they are widely used. Today, let's take a look at the difference between these two kinds of fans.
轴流风机和离心风机在机械通风中的作用
The role of axial fan and centrifugal fan in mechanical ventilation
1 由于气温和粮温相差较大，一次通风时间要选在白天，以减小粮温和气温的差距，减轻结露的发生。以后的通风尽量选在晚上进行，因为本次通风是以降温为主，晚上大气湿度相对偏高、温度较低，这样即减少了水份损耗，又充分利用了晚上的低温，提高了降温效果。
Due to the large difference between temperature and grain temperature, the first ventilation time should be selected in the daytime to reduce the difference between grain temperature and temperature and reduce the occurrence of condensation. The future ventilation should be carried out in the evening as far as possible, because the ventilation is mainly to reduce the temperature. The air humidity is relatively high and the temperature is low in the evening. In this way, the water loss is reduced, and the low temperature at night is fully utilized to improve the cooling effect.
2 用离心风机通风初期有可能会出现门窗、墙壁结露，甚至表层粮面轻微结露，只要停止风机，打开窗户，开启轴流风机，必要时翻动粮面，将仓内的湿热空气排除仓外就可以。而用轴流风机进行缓速通风就不会出现结露现象，只会出现中上层粮温缓慢上升，随着通风的继续进行粮温会平稳下降。



2. In the early stage of ventilation with centrifugal fan, there may be dew condensation on the doors and windows and walls, and even slight condensation on the surface grain surface. As long as the fan is stopped, the window is opened, the axial fan is turned on, and the hot and humid air in the bin can be removed from the warehouse if necessary. However, if the axial-flow fan is used for slow speed ventilation, there will be no condensation, and only the temperature of the middle and upper layers will rise slowly, and the grain temperature will decrease steadily with the continuous ventilation.
3 用轴流风机进行缓速通风时，由于轴流风机的风量小，另外粮食是热的不良导体，通风初期容易出现个别部位通风缓慢，随着通风的继续进行全仓粮温会逐渐平衡。
3. When the axial fan is used for slow speed ventilation, because the air volume of the axial fan is small and the grain is a poor conductor of heat, the ventilation of individual parts is slow in the initial stage of ventilation, and the temperature of grain in the whole warehouse will gradually balance with the continuous ventilation.
4 进行缓速通风的粮食必须经过震动筛的清理，并且入到仓内的粮食必须及时清扫自动分级造成的杂质区，否则易造成局部通风不均。
4. The grain with slow ventilation must be cleaned by vibrating screen, and the grain entering the warehouse must be cleaned in time to the impurity area caused by automatic classification, otherwise it is easy to cause uneven local ventilation.
济南通风管道
Jinan ventilation duct
5 能耗计算：14号仓用轴流风机累计通风50天，平均每天15小时，共用750小时，水份平均降了0.4%，粮温平均降了23.1度，单位能耗为：0.027kw.h/t.℃。28号仓累计通风6天，共用126小时，水份平均降了1.0%，温度平均降了20.3度，单位能耗为：0.038kw.h/t.℃。
5 energy consumption calculation: the axial-flow fan used in No.14 warehouse has accumulated 50 days of ventilation, with an average of 15 hours per day and 750 hours of common use. The average water content and grain temperature decreased by 0.4% and 23.1 ℃ respectively, and the unit energy consumption was 0.027kw.h/t. ℃. The results show that the total ventilation time of No.28 warehouse is 6 days and 126 hours. The moisture content and temperature are reduced by 1.0% and 20.3 ℃ respectively. The unit energy consumption is 0.038 kW · H / T. ℃.
6 以轴流风机进行缓速通风的优点：降温效果良好;单位能耗低，在倡导节能的今天尤为重要;通风时机易掌握，不易出现结露;不用单独配备风机，方便灵活。缺点：由于风量小，通风时间长;降水效果不明显，高水份粮不宜用轴流风机进行通风。
The advantages of slow speed ventilation with axial flow fan are: good cooling effect; low unit energy consumption, which is particularly important in today's advocating energy conservation; the ventilation opportunity is easy to grasp, and condensation is not easy to occur; there is no need to equip the fan separately, which is convenient and flexible. Disadvantages: due to the small air volume and long ventilation time, the effect of precipitation is not obvious, so the axial flow fan is not suitable for ventilation of high moisture grain.
7 离心风机的优点：降温、降水效果明显，通风时间短;缺点：单位能耗高;通风时机掌握不好易出现结露。
Advantages of centrifugal fan: obvious cooling and precipitation effect, short ventilation time; disadvantages: high unit energy consumption; poor ventilation timing, prone to condensation.
8 结论：在以降温为目的的通风中，应用轴流风机进行安全、便捷、节能的缓速通风;在以降水为目的的通风中应用离心风机。
Conclusion: the axial fan is safe, convenient and energy-saving in the ventilation for cooling, and the centrifugal fan is used in the ventilation for precipitation.
其实这两种通风管道设备无论是在运用原理方面还是在构造方面其实区别都还是比较的明显的。我们之所以能够轻松的对这两种风机进行区分，是因为它们外观上有着很大额区别，但是它们的长处也不同，而且更能进行互补。
In fact, the differences between the two kinds of ventilation duct equipment are obvious in terms of operation principle and structure. The reason why we can easily distinguish these two kinds of fans is that they have a big difference in appearance, but their strengths are also different, and they can complement each other more easily. 上一篇：安装厨房排烟罩如何才能保证空气的质量？
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