No matter what type of exhaust equipment, the most important thing is to make the kitchen, especially the side dishes, cooking areas to form negative pressure. The negative pressure refers to the amount of air discharged out, which is greater than the amount of fresh air added into the kitchen so that the kitchen can keep the air fresh.

　　廚房內的通風、排風系統(tǒng)包括排煙罩（油網(wǎng)式煙罩、水渡式煙罩）、抽風機（離心風機、軸流風機等）、排煙風管、送新風管及空調系統(tǒng)，有效的通風、排風必須符合下列標準：

　　The ventilation and exhaust systems in the kitchen include smoke exhaust hood (oil net smoke hood, water crossing smoke hood), exhaust fan (centrifugal fan, axial fan, etc.), smoke exhaust duct, fresh air pipe and air conditioning system. Effective ventilation and exhaust must meet the following criteria.

　　廚房和面點間等熱加工間的通風換氣，其中65%由排煙罩排出，35%由送新風管和換氣扇換氣完成，換氣一般每小時40次為宜（可在產(chǎn)品上設置頻率）。

　　The kitchen and pastry room heat processing room ventilation, of which 65% by hood exhaust, 35% completed by the fresh air supply pipe and fan ventilation, ventilation is generally 40 times per hour. (frequency can be set on the product).

　　排氣罩吸氣速度一般不應小于0.5米/秒（購買產(chǎn)品時有規(guī)格要求），排風管內速度不應大于10米/秒（購買產(chǎn)品時有規(guī)格要求）。

　　The suction speed of exhaust hood should not be less than 0.5 meters per second, and the speed of exhaust pipe should not exceed 10 meters per second.

　　廚房和面點間等熱加工間的補風量應該是排風量的70%左右，房間負壓值不應大于5帕（可在相關的儀器上測量），使廚房內產(chǎn)生的油煙氣味不會往餐廳飄散，以達到隔熱、隔味的效果。

　　The supplementary air volume between the kitchen and the noodle should be 70% of the discharge volume, and the negative pressure value of the room should not be greater than 5 PPA (which can be measured on the related instruments), so that the smell of lampblack produced in the kitchen will not float to the restaurant, so as to achieve the effect of heat insulation and odor separation.

　　廚房內部有不少火災隱患，如房內的燃氣、油的泄漏，爐灶燃燒時產(chǎn)生的高溫，煙罩內長期積累的油污等。如果平時管理不善或不注意保養(yǎng)、檢查，一不小心就會引起火災。

　　There are a lot of fire hazards in the kitchen, such as the leakage of gas and oil in the room, the high temperature produced during the burning of the stove, the long accumulation of oil in the smoke mask, etc. If the management is not good or pay attention to maintenance, inspection, one careless will cause fire.

　　因此，平時除了強化員工的消防意識，防患于未然外，在廚房間還必須裝置必要的消防設施。如煙感報警器、噴淋裝置、二氧化碳滅火器等。使用燃氣的單位，在廚房內還應裝置煤氣泄漏報警器。

　　Therefore, in addition to strengthening the staff's awareness of fire safety, in the bud, the necessary fire-fighting facilities must be installed in the kitchen. Such as smoke alarm, spray device, carbon dioxide extinguisher and so on. A gas leak alarm should also be installed in the kitchen with a unit of gas.
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