我国的膳食习惯用油煎炸炒的食物很多,因此厨房的墙壁、钢窗、窗纱、家具上就易积很厚的油腻,并被腐蚀。若仅在厨房排烟井上开个排气口,对厨房进行全面通风,排烟效果并不佳。原因是吸气口速度衰减很快,做饭炒菜产生的油烟基本不在吸气口的作用范围内,在热压的作用下直冲屋顶,再在室内横向气流的影响下到处漂溢。国外的厨房设计,一般都确定炉灶的位置,在炉面上部0.8～1米处装排烟罩,直接捕吸油烟气进行处理或排出室外,厨房外窗不开就可有效地保持厨房清洁,不受外界气候的影响。现本文就厨房排烟问题做一些探讨。理论研究证明利用排烟井的烟囱效应进行自然 China’s dietary habits use fried fried and fried foods, so the walls, steel windows, screens, and furniture on the kitchen are prone to greasy foods and are corroded. If only an exhaust port is opened on the kitchen exhaust well, full ventilation of the kitchen is performed and the smoke exhausting effect is not good. The reason is that the suction port decays rapidly, and the cooking fumes produced by cooking are basically not within the range of the suction port, and are rushed into the roof under the action of hot pressure, and then overflow everywhere under the influence of the indoor transverse airflow. The design of foreign kitchens generally determines the location of the stove. The exhaust hood is installed at the top of the stove at 0.8 to 1 meter. It is used to directly catch oil fumes for treatment or discharge outdoors. The kitchen outside the window can effectively keep the kitchen clean. It is not affected by the outside climate. This article is to make some discussion on the issue of kitchen exhaust. Theoretical research proves that using the smokestack’s chimney effect for nature