1、 Pipeline impact
1. Smoke exhaust pipe of middle and high rise buildings. The kitchens of middle rise buildings all use the same smoke exhaust pipe. So the oil stain in the kitchen will be transmitted to the outside through the pipeline. For those floors near the main pipe, the kitchen smoke exhaust effect is better. Because there is no other impact, and for those kitchens far away from the main passage, the smoke will be worse.
2. Smoke exhaust pipes of low rise buildings. In this type of kitchen, you can choose to design a smoke vent between two walls, which can completely smooth smoke exhaust.
3. Smoke exhaust pipe of high-rise buildings. The smoke exhaust pipe of high-rise kitchen is required to be high, and the smoke exhaust height of the kitchen should be designed to be more than 2.4 meters. A circular hole with a diameter of 170-200mm can be designed for the kitchen smoke exhaust design outlet, which will ensure that the oil stains in the kitchen leave the kitchen smoothly and cleanly.
2、 Layout of air supply and exhaust outlets
When installing the air inlet and outlet of the smoke exhaust pipe in Jinan kitchen, it should be considered according to the specific location of the cooker, and the air supply jet should not interfere with the exhaust ventilation of the cooker. When determining the outlet wind speed of the air supply outlet, the regional wind speed is 0.25m/s when it is about 2m from the ground. The air supply outlet shall be arranged along the direction of the exhaust hood, 0.7m away from the front of the exhaust hood. The air outlet shall be as far away as possible from the exhaust hood.
3、 Smoke exhaust pipe design
The horizontal section of kitchen smoke exhaust pipe should not be too long. The horizontal distance shall not exceed 15m generally, and the gradient shall be greater than 2%. The horizontal end shall be provided with flexible joints to facilitate the removal of oil dirt. According to the specification, the exhaust speed shall not be less than 10m/s to prevent oil from adhering to the flue due to low wind speed. The branch pipe connected to the exhaust hood shall be equipped with an air volume control valve.