Since the environment of commercial kitchens is very complicated, the different ducts and ventilation projects of commercial kitchens smoke exhaust systems have different characteristics, so there will be some special circumstances when designing smoke exhaust ducts, and the following principles need to be followed. Only in this way can a reasonable exhaust duct be designed. So, what principles should be followed when designing a commercial smoke extraction system?
1. Must provide space for piping design
In the exhaust ventilation system, over time, oil and dust will accumulate on the fan blades and ducts, increasing resistance and reducing the efficiency of the system ducts. Therefore, it is necessary to consider the degradation of the system function in the design, and leave an appropriate margin. The smoke exhaust pipe is also different from the outdoor air pipe, and the smoke exhaust pipe needs to leave more space.
2. The pipeline setting should be simple and smooth
Once the layout of the kitchen is determined, the exhaust pipe must be designed according to the position of the exhaust hood and the position of the exhaust diffuser. Especially when multiple exhaust pipes and external air ducts are arranged in the same space, the height of the kitchen and the structural space such as vents are restricted. The position of the air duct is determined by the spatial structure. The pipe setting should be simple and smooth, avoid overlapping, and Provide space for installation and maintenance. The direction of the air duct should be selected according to the actual structure of the kitchen, and then the material of the air duct should be selected according to the height, shape, wind speed, and airflow characteristics of the air duct.
3. Reduce the pipe resistance of the smoke exhaust system
According to the general layout plan of the piping space structure of the smoke exhaust system, the system layout plan is formulated. The height of the elbow should be as short as possible, and the length of the elbow should be extended to 90°. At the same time, the space of various pipes should be adjusted.
4. Pay attention to the direction of smoke exhaust
The direction of the outdoor oil fume exhaust pipe is designed according to the local wind direction, using elbows, cover plates and other components. Try to avoid the monsoon direction as much as possible to avoid increased wind resistance, increased smoke, indoor moisture accumulation during shutdown, rain and snow.
5 Pay attention to sealing to prevent leakage
Dirty oil and sewage flow out of the smoke exhaust system, and rain and snow also produce sewage. Therefore, install slope sewer openings on horizontal pipelines, determine the slope and location of slope sewer openings, prevent dirty oil and sewage from passing through the pipeline kitchen, and avoid leakage and food contamination.