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厨房排烟风速设计原则是什么？

厨房排烟风速设计原则是什么？

浏览：40次 | 提问时间： 07-31 11:03

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他唇毁她纯 07-31 11:04

风量的确定和风速设计原则厨房的排风量由两部分组成：局部排风量和全面排风量。局部排风量应根据选用的灶具等设备种类、数量以及抽排烟罩的型式等加以确定，即根据炉灶等设备的平面布置图，烟罩种类，抽油烟离心风机的除油烟方式及设备产生风机性能的强度等因素进行确定。《饮食业油烟排放标准》中规定：每个基准灶头对应的发热功率为1.67×108J/h，对应的排气罩灶面投影面积为1.1㎡，大、中、小型的单个灶头基准排气量均为20003/h。但不同的菜系通风要求有所差别，如西餐的厨房油烟相对较少，而中餐相的厨房对油烟较多。特别是川菜、湘菜的厨房，因辣味严重刺激鼻子和眼睛，排风量要适当加大。还有就是现实案例中有很多共用管道的情况。另外，在采用运水烟罩时风量也要适当加大。遇到以上类似情况的时候风量应根据适当增加。送风量方面，厨房内应保持负压状态，但负压值不大于5Pa。如果正压，厨房油烟味会窜到餐厅，引起顾客不适；但负压过大，炉灶会脱火或火苗乱窜，影响炉灶燃烧效果。厨房送风系统通常指：室外新风+空调送风，按抽排风量的80％左右考虑。排烟罩口吸气速度通常取0.5m/s,喉管取5m/s,通过管道的排风速度一般不低于10m/s，通常取10m/s—16m/s，以防风速过低致使油烟附着于管道上。管道中风速越大，噪音和震动也就越大。但管道送风速度可以低些，抽风柜后的风速比抽风柜前的可以取大些。

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