First, the auxiliary flue must be kept

Every kitchen has a flue, and at the same time, the flue also has the main and auxiliary points. The main flue runs through the whole building, while the auxiliary flue is relatively independent. Generally, the lampblack in the home will go to the auxiliary flue first, and then enter the main flue through the hole in the partition, so as to ensure that the lampblack in each household is isolated. However, if the auxiliary flue is directly connected to the main flue, it will lead to the phenomenon of inverted smoke or cross smoke due to too low pressure.

Second, pay attention to the construction details

First of all, it is very important to choose the installation location of the range hood. The shorter the pipe, the better. Some owners will pull the pipes longer for the sake of beauty. In this way, after turning off the range hood, there will be a lot of oil smoke in the pipes that can't be discharged and then poured back indoors. In addition, in order not to destroy the original main and auxiliary flue, its opening direction can not be changed at will, so it must be played in the auxiliary flue.

Third, pay attention to the safety of smoke exhaust from windows

In order to avoid the problem of smoke cross-talk, some owners give up the original flue and directly open holes in the windows to exhaust smoke. This is ok, but there are several points to pay attention to.

First of all, the opening of windows or walls must be approved by the property; Secondly, pay attention to the safety problem. Generally, the end of the smoke exhaust pipe is made of metal. If the hole is too small, the metal heat transfer may cause the glass to burst and hurt pedestrians, and the smoke exhaust pipe leads out of the window, and the strong north wind blowing against it will lead to oil smoke backflow. It's best to extend the pipeline and then nest it down, so as to avoid rainwater from flowing into the pipeline when it rains, and keep the windshield outside.

Fourth, frequently replace the check valve

If the auxiliary flue has been removed, or it is necessary to prevent the smoke from pouring out better, then use the flue check valve. Under normal circumstances, the check valve effect of the range hood is not obvious, but installing the check valve in the flue can protect the range hood, so that the smoke in the flue will not flow backwards into the pipeline and the range hood. However, after installing the check valve, it should be cleaned regularly, otherwise it will make the check valve open and lose its effect, and it is best to replace the flue check valve every two years or so.