The flue occupies a large kitchen space, making it difficult for home builders and occupants to accept. The direction of the air inlet is too dead to be changed at will, and the layout of the exhaust pipe in the kitchen is limited and not flexible enough. It is more difficult to promote and apply. Compared with the total amount of residential construction in Guangzhou in each year, the speed of promotion and application of variable-pressure exhaust pipes in residential kitchens is too far, which is very regrettable.
In order to cope with the residential code (Guangzhou City Code), some developers must use the vertical pipe exhaust regulations to continue to replace the transformer row with a traditional brick chimney or a poorly-performing small-section flue. The flue, in order to hide people's eyes and ears, has left many new residential kitchens with oily smoke problems.
Through the practice of the promotion and application of the flue-curling pipeline, it is concluded that in order to make this new technology for the benefit of the people widely popularized and applied, it is necessary to carry out more in-depth research on its technology and continue to carry out transformation and innovation. To this end, Guangzhou Citizens' Building Research and Design Institute and Guangzhou Kingdee Industrial Co., Ltd. continue to work together. Starting in 1999, the research and improvement of the transformer-type exhaust pipe was started.
He organized a research team headed by Nie Fayu, chief engineer, and hired a section on fluid mechanics and armored circles to discuss the path. It inherits the transformation principle of the traditional transformer-type oil-discharge flue, but replaces the unidirectionally-arranged variable-pressure plate with a symmetrically arranged venturi plate, thereby accelerating the air flow rate in the pipe. It uses a coupled high-rise flow. The device replaces the original fixed guide tube, and the coupling adjustable flow guiding device and the anti-cross smoke exhaust valve jointly form an anti-stringer odor component, which is more reasonable than the original guide tube design, and can be guaranteed under the condition of single flue. More effectively eliminate the retardation of the air curtain and the phenomenon of backflow and crosstalk.
At the same time, it does not install the check valve into the pipeline like the double check valve, it is easy to produce oil stains and it is difficult to remove, so that the plugged valve body can not be opened, but a new type of coupled anti-smoke exhaust valve is installed in the pipeline. Outside, it is very convenient to disassemble and clean. In addition, it has designed a new type of diversion cone hood (patented), which not only further reduces the exhaust resistance and prevents backflow, but also converts the natural wind energy into attractiveness, helping the inside of the exhaust duct. Airflow is discharged.
In addition, the exhaust passage has the advantage that the direction of the exhaust port is not limited, and the design is flexible.
The results show that under the most unfavorable situation of variable pressure anti-smoke anti-backflow exhaust duct, all floors can smoothly discharge smoke, and there is no smoky odor. Especially worthy of praise is that the pressure on the upper and lower floors of the exhaust duct is balanced, the exhaust volume is balanced, and it can produce a good “extracting smoke†effect, completely overcoming the excessive exhaust volume of the upper floor existing in the traditional exhaust passage. The defect of insufficient exhaust on the lower floor.
According to the residential laboratory staff of the China Academy of Building Technology, the pipeline is the most ideal of all kitchen exhausts they have tested. The technical appraisal meeting jointly organized by the pressure-proof anti-smoke anti-backflow exhaust pipe and the Guangzhou Municipal Construction Committee, the experts at the meeting agreed that the technical level of the variable pressure anti-smoke anti-backflow exhaust pipe is in a leading position in China.
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