The smoke exhaust pipe of a range hood is flooded, which is usually caused by improper installation or blockage of the smoke exhaust pipe. The specific reasons are as follows:

1. Improper installation: the smoke exhaust pipe of the range hood needs to be sealed with the roof, wall and window to prevent rainwater from infiltrating into the pipe. If it is improperly installed, the pipeline gap is too large or it is not completely sealed, it will easily lead to rainwater entering the pipeline, resulting in water flooding.

2. pipeline blockage: the smoke exhaust pipeline of range hood is easy to accumulate oil fume and dust because it is not cleaned for a long time, and gradually condenses into oil layer to block the pipeline. At this time, the smoke exhaust pipe can not be ventilated and exhausted normally, and the accumulated waste gas will generate pressure and even flow back to the kitchen, resulting in the smoke exhaust pipe overflowing.

In order to prevent the smoke exhaust pipe of the range hood from overflowing, we can take the following measures:

1. Pay attention to sealing when installing: when selecting the appropriate smoke exhaust pipe, pay attention to the use of joints between components, sealing rubber rings and sealing rubber pads, and the specific installation methods. Ensure that each pipeline is closely connected to prevent water vapor from infiltrating into the smoke exhaust pipeline.

2. Regularly clean the range hood and smoke exhaust pipeline: generally, we recommend cleaning at least once every six months. When cleaning, the smoke exhaust pipeline should be disassembled, and the pipeline should be thoroughly cleaned with detergent and high-pressure water, and the oil layer should be carefully removed.

3. Always turn on the range hood: the gradually saturated filter can reduce the mouth and nose volume of the range hood and the resistance of the exhaust pipe. Frequently opening the range hood and cleaning its filter screen can effectively reduce the oil fume in the pipeline and help prevent the pipeline from overflowing.

To sum up, the smoke exhaust pipe of the range hood overflows because of improper installation or blockage of the smoke exhaust pipe. We need to seal between each pipe during installation, keep the pipe unblocked and clean the range hood and smoke exhaust pipe regularly. In this way, water can be avoided in the pipeline, and good ventilation effect and healthy and safe living environment can be ensured.