(1) Single flue type:
Composed of a simple rectangular smoke pipe, it vertically passes through each floor of the residential building, leaving an air inlet connected to the range hood in each floor of the residential building, and the bottom floor is supplemented by a supplementary air outlet. The principle is that each layer of smoke is pushed by the range hood to discharge the smoke into the flue. Due to the temperature of the smoke, it generates upward buoyancy in the flue and is discharged from the roof outlet.
(2) Primary and secondary equations:
Consisting of two parallel rectangular smoke pipes, passing vertically through each floor. The secondary flue is equipped with an air inlet connected to the range hood on each floor of the residential building. The secondary flue meets the main flue at a distance from the air inlet, and there is a supplementary air outlet at the bottom layer of the main flue. The principle is to push the smoke into the secondary flue through a range hood, use the driving force of the range hood and the buoyancy force of the smoke temperature to raise the smoke for a certain distance, and then enter the main flue to exhaust the roof. In this way, due to the continuous upward movement of smoke, the phenomenon of backflow and cross odor caused by smoke is avoided.
(3) Variable voltage:
Make the smoke ducts on each floor in different cross-sectional forms. The lower smoke ducts are discharged through the primary and secondary smoke ducts, while the smoke ducts near the roof act as a single smoke duct, directly discharging oil fumes into the smoke ducts. The purpose of variable pressure flue is also to attempt to change the cross-sectional form of the flue, utilize various physical laws of smoke flow, maintain upward airflow, and prevent smoke backflow and cross flow.
(4) Check valve type:
Install a complex anti backflow check valve at the air inlet of each layer on the single pipe flue, which also serves as an interface for the range hood, to force the flue gas to move unidirectionally towards the flue, thereby solving the problem of flue gas interlocking.