双吸式吸油烟机污染捕集能力研究

Research on Cooking-derived Pollution Capture Efficiency of Double Suction Range Hood

吸油烟机是常见家电设备之一。本文通过数值模拟分析的方法对比了双吸式吸油烟机的顶吸与侧吸口在不同排风比例下油烟捕集情况,并使用捕集效率和吸入因子对比了捕集差异和呼吸区污染物暴露情况;在吸油烟机排风量为400m3/h、600m3/h和800m3/h的条件下,进行了0〜8cm的顶部吸气口长度(顶吸口排风比例约为0〜40%)仿真分析。研究发现,在400m3/h排风量时,顶部吸气口长度为8cm(顶部吸气口排风40%)时捕集效率最佳;在600m3/h排风量时,顶部吸气口长度为2cm(顶部吸气口排风10%)时捕集效率较优;在800m3/h排风量时,顶部吸气口关闭时捕集效率最好。由此可见,双吸式吸油烟机应基于实际的运行排风量实时调节顶吸与侧吸口排风比例。

Range hood is one of the most common household appliances.Numerical simulation was applied to compare the capture performance of the double suction range hood under different exhaust flowrates.The capture efficiency and the Intake fraction were used to compare the capture and pollutant exposure differences.0〜8 cm top suction port(the exhaust ratio of the top suction port is about 0〜40%)is analyzed when the exhaust flowrate of the hood is 400m3/h,600m3/h,and 800 m3/h.The best capture performance was achieved with 8 cm top suction port length(top suction port exhaust about 40%)under400m3/h exhaust flowrate,while it was 2 cm top suction port length(top suction port exhaust about 10%)under 600 m3/h exhaust flowrate,and it was 0cm top suction port length(top suction port is closed)under 800m3/h exhaust flowrate.It can be seen that the ratio of suction and side suction flowrate should be adjusted in real-time based on the actual exhaust flowrate.