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The installation design of the kitchen exhaust pipe

Update:13-10-2022
Summary:

What material is better for kitchen exhaust pipes? PVC […]

What material is better for kitchen exhaust pipes?

PVC material is suitable for kitchen fume exhaust pipes. Because the melting temperature of PVC material is between 185 and 205 ℃, and the stability is strong, the temperature of oil fume is far from reaching this temperature. PVC material has high chemical stability, so it can be used to make anti-corrosion pipelines, pipe fittings, oil pipelines, etc. PVC material is one of the plastic products with the largest output, the price and the wide range of applications.

For long-term consideration, use 160 PVC pipe to lead to the top of the range hood. You use a long enough hose. When the range hood is working, the hose will keep shaking due to the wind force, and the new air duct is no problem. But after a long time, the air duct is aging, and the vibration is enough to cause the air duct to break and leak oil. The PVC pipe does not have this problem. You can safely seal it in the ceiling and use it for a lifetime. If you want to replace the air duct, just replace it. From the base of the range hood duct to the PVC pipe mouth.

The installation design of the kitchen exhaust pipe

The pipeline layout in the kitchen should follow the "short" principle, and use less elbows, which are large-angle elbows. This way of piping is different from the "horizontal and vertical neatness" of the air conditioner. The purpose is to ensure the effect of exhausting oil fume and also save money. The middle position of the main outlet fume hood of the collector pipe above the fume hood.

The new air duct and the exhaust duct are equipped with mufflers at the partition walls of the rooms. The exhaust duct of the kitchen should try to avoid too long horizontal air ducts.

Otherwise, it is not conducive to the rapid discharge of flue gas and affects the exhaust effect. Usually, the long distance of the exhaust pipe is not more than 15m. The horizontal pipeline should have a slope of more than 2%, the slope should be exhausted, and an oil collecting box should be set at the lower part of the pipeline.

For mechanical or natural vertical exhaust ducts in the kitchen, measures to prevent backflow should be taken. The end of the horizontal pipe is connected with a live flange to clean up grease. In principle, it is not allowed to discharge oil fumes into underground sewage or drainage wells, the effect is extremely poor, and it is also impossible in terms of hygiene and safety.

The general air inlet and exhaust outlet of the kitchen should be set separately to prevent short circuit, and the air inlet should be more than 2m away from the outdoor natural ground. If the air inlet and the air outlet are on the same floor and facing the same time, the air inlet must be lower than the air outlet.

Exhaust vents with different orientations must not return air to the intake vents. When the height of the building where the kitchen is located is less than or equal to 15m, the fume discharge outlet should be higher than the roof, in principle, it should be higher than the building by more than 2m. When the height of the building is greater than 15m, the height of the fume exhaust port should be greater than 15m. The finished product of the pipe cap (pipe cover) that is less affected by the outdoor wind pressure should be installed on the outdoor exhaust port of the exhaust pipe.

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