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由于风筒中的阻力损失与流速的平方成正比,与风筒直径的五次方成反比,所以,满足大风量要求的风筒,其直径必须扩大。目前,高效率局部通风机的风筒直径一般在1.0～1.6m,风机出口的最大风压为8000Pa。但是,风筒直径超过1m时,由于风筒重量增大,给风筒连接工作带来了一定的困难;若缩短风筒长度,又必然会增加连接次数,从而带来较大的漏风损失。因此,威斯
As the resistance loss in the duct is proportional to the square of the flow rate and inversely proportional to the fifth power of the duct diameter, the diameter of the duct that meets the requirements of the gale must be enlarged. At present, the high efficiency local fan duct diameter is generally 1.0 ~ 1.6m, the maximum fan outlet pressure 8000Pa. However, when the diameter of the hair dryer exceeds 1m, the weight of the hair dryer increases, which brings certain difficulties to the connecting work of the hair dryer. If the length of the hair dryer is shortened, the number of connections will inevitably increase, resulting in greater air leakage loss. So, Wes