編輯同志:我們閱讀了‘有色金屬’第二期,李曉惠同志著的‘机械通風的一般理論计算与檢查方法’一文,在第五頁內有这樣一句話:‘应当注意的是:根據通风方式的不同,用以选擇扇風机的特性曲線也不同,如採用吹風式通風方法,則应当用全压曲線和全压效率曲線來决定;如採用吸出式通風法,则应用靜压曲線与靜压效率曲線。’我們很难理解。在所能找到的幾本有開通風書上也無此种提法。我們認為这句話与我們做過的幾個设計所用的原理不同。同時,離心式通风机只有全压全效率曲線,而軸流式只有静压效率曲線,請問在压风选轴流式与吸風选離心式应如何选擇?请从理論上加以解答為盼。有色冶金設計院孔憲靖 Editorial Comrades: We read the article entitled ’General Theoretical Calculation and Inspection Methods of Mechanical Ventilation’ by the second phase of ’Nonferrous Metals’ and Comrade Li Xiaohui. On the fifth page, there is a remark:’ It should be noted that: according to ventilation Different ways to choose fan fan characteristic curve is also different, such as the use of hair-style ventilation method, you should use the full pressure curve and the total pressure efficiency curve to decide; such as the use of suction ventilation method, the application of static pressure curve And static pressure efficiency curve. We can hardly understand. There are no such references in the few that can be found in the open book of wind. We think this statement is different from the principles used by several designs we’ve done. At the same time, the centrifugal fan only full-pressure full efficiency curve, while the axial-only hydrostatic efficiency curve, the choice of axial flow and suction blower in the election should choose how to centrifugal? Please answer in theory for the hope . Nonferrous Metallurgy Design Institute Kong Xian