长时间外出,家中需要注意一些事宜:地漏上盖层保鲜膜。地漏是排除地面积水的设备,地漏水封则是阻隔异味的重要工具,其工作原理就是利用水将两部分气体隔离开来。因此,水封几天不用就会产生异味。建议在外出期间,用保鲜膜将其封上,或用湿抹布、盆、桶将其盖上,以防异味进入室内。 For a long time to go out, the family need to pay attention to some issues: Floor drain on the cover plastic wrap. Floor drain is to exclude the surface area of ​​water equipment, floor drain seal is an important tool to block odor, and its working principle is to use water to separate the two parts of the gas. Therefore, the water seal a few days will produce odor. It is advisable to cover it with cling film or to cover it with a damp cloth, basin or bucket during travel to prevent odors from entering the room.