我們生產的濟南排煙罩，它采用撞擊流原理，其核心技術設備是一種主動的高速氣液接觸裝置。設備具有傳質系數高、體積小、凈化效率高、能耗較低的特點，其油煙凈化效率可達95%以上。系統(tǒng)中的反應箱中無機械動力及控制裝置的氣液接觸機構，是現(xiàn)有的油煙凈化設備中凈化效率較高、運行成本低、體積小的油煙凈化裝置。
Jinan exhaust hood, which is produced by us, adopts the principle of impinging stream. Its core technical equipment is an active high-speed gas-liquid contact device. The equipment has the characteristics of high mass transfer coefficient, small volume, high purification efficiency and low energy consumption, and its oil fume purification efficiency can reach more than 95%. There is no gas-liquid contact mechanism of mechanical power and control device in the reaction box of the system. It is the fume purification device with higher purification efficiency, lowest operation cost and smallest volume in the existing fume purification equipment.
排煙罩是由罩體和罩蓋上下兩部分構成，罩體由三個平面組成，罩蓋由前、后、左、右四個平面（或稱擋板）構成一個錐體。其錐體的下端與罩體相連，上端與抽油煙機相連，活動擋板開在罩體或罩蓋靠近窗戶的任意一面，前擋板帶有缺口美觀、精致，抽油煙徹底，同時不污染環(huán)境，有利于人體健康，結構簡單，造價便宜。
The exhaust hood is composed of a hood and upper and lower parts of the hood. The hood is composed of three planes. The hood consists of four planes (or baffles) which are front, rear, left and right. The lower end of the cone is connected with the hood body, the upper end is connected with the hood hood, and the movable baffle is opened on any side of the hood body or the cover near the window. The front baffle has a beautiful and delicate gap, and the smoke is exhaustive, without polluting the environment, which is beneficial to human health, simple structure and low cost.
鐵制排煙罩僅為一矩形鐵制罩子，上開一孔接排煙管，罩在灶臺的上方。利用熱空氣上升的原理使油煙自然抽出室外。該種排煙罩工藝簡單，成本低廉，但排煙效果較差，只適用于煙霧不大的小型飲食場所。目前沒有定型產品，而是根據灶具的大小現(xiàn)場制作。
The iron exhaust hood is only a rectangular iron hood with a hole connected to the exhaust pipe and covered above the stove table. By using the principle of hot air rising, the lampblack can be pumped out of the room naturally. The smoke exhaust hood has the advantages of simple process and low cost, but its smoke exhaust effect is poor, and it is only suitable for small food places with little smoke. At present, there are no stereotyped products, but according to the size of the kitchen on-site production.
排煙罩罩口的截面形狀盡可能與煙氣散發(fā)源的水平投影相似。
As far as possible, the cross-section shape of the hood is similar to the horizontal projection of the smoke emission source.
排煙罩的收縮角度口宜等于或小于60°，大不應大于90°。為了降低排煙罩的高度，對于邊長較長的矩形排煙罩可將長邊分段設置。
The shrinkage angle of the exhaust hood should be equal to or less than 60 degrees, and the maximum should not be greater than 90 degrees. In order to reduce the height of exhaust hood, the long side of rectangular exhaust hood can be segmented.
排煙罩罩口邊宜留有一定高度的垂直邊（裙邊），垂直邊的高度為罩口面積。
The vertical edge (skirt edge) of the hood should be kept at a certain height, and the height of the vertical edge should be the hood area.
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