本文介绍了在通风机内部结构上采取降低噪声的两种措施及试验研究结果.一种是对风机叶片的进、出气边作锯齿形处理,另一种是对风机叶片的出气边作仿生学处理.试验结果表明,锯齿形处理可降低A声级噪声2—5％,尤以齿距z=0.1b齿高h=0.1b的锯齿形处理为佳,试验结果还表明,“风机叶片的仿生学处理可以降低A声级噪声,降噪幅度在风量一定的条件下主要取决于仿生学处理的叶片相对长度。ΔL/L.上述方法是值得推广的降低通风机噪声的有效措施. This paper introduces two measures to reduce noise in the internal structure of the ventilator and the experimental research results: one is to serrate the inlet and outlet of the fan blades, and the other is to simulate the outlet side of the fan blades The test results show that zigzag processing can reduce 2-5% A-level noise, especially zigzag processing with tooth pitch z = 0.1b tooth height h = 0.1b. The test results also show that " Bionomics can reduce the A-level noise, and the noise reduction range depends on the relative length of the bionic leaves when the air volume is constant.ΔL / L.The above method is an effective measure to reduce the fan noise.