专注通风管道加工·排烟罩

（1） 单烟道式：

(1) Single flue type:

由一个简单的矩形烟管构成，垂直穿越各层住宅，在每层住宅中留有一个连接抽油烟机的进风口，底层由一个补风口补气。其原理是各层烟气在抽油烟机的推动下，将油烟排入烟道中，由于烟气温度的作用，在烟道中产生上升浮力，从出屋面的出风口将烟气排出。

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） 主次式：

(2) Primary and secondary equations:

由两个并列矩形烟管构成，垂直穿越各楼层。次烟道在住宅每层中设一连接排油烟机的进风口，次烟道与主烟道距进风口一些距离处相汇，主烟道底层有一补风口。其原理是通过抽油烟机将烟气推入次烟道中，用抽油烟机推动力和油烟温度上浮力使油烟上升一段距离后再进入主烟道排出屋面。这样由于烟气始终向上运动，避免了烟气产生的倒灌和串味现象。

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） 变压式：

(3) Variable voltage:

将各层的烟道做成不同的截面形式，下层烟道通过主次烟道排气，而靠近屋面的烟道如同单烟道的作用，直接将油烟排入烟道排出。变压式烟道的目的也是试图通过改变烟道的截面形式，利用烟气流动的各种物理规律，使气流保持向上的运动，防止烟气倒灌和互串。

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） 止逆阀式：

(4) Check valve type:

在单管烟道上的各层进风口处，加装一个兼有抽油烟机接口作用的复杂防气流逆行的止逆阀，迫使烟气向烟道单向运动，从而解决烟气互串的问题。

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.

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