净化车间压力控制方案...

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<p align="center"><b>净化车间压力控制方案</b></p>
<p align="center"><b>&nbsp;</b></p>
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<p align="center">符号</p></td>
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<p align="center">型号</p></td>
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<p align="center">数量</p></td>
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<p align="center">设备名称</p></td>
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<p align="center">备注</p></td></tr>
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<p align="center">DDC</p></td>
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<p align="center">FLYER2</p></td>
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<p align="center">1</p></td>
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<p align="center">直接数字控制器</p></td>
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<p align="center">&nbsp;</p></td></tr>
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<p align="center">OP</p></td>
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<p align="center">按工程要求选择</p></td>
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<p align="center">1</p></td>
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<p align="center">压差传感器</p></td>
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<p align="center">&nbsp;</p></td></tr>
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<p align="center">FV</p></td>
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<p align="center">按工程要求选择</p></td>
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<p align="center">2</p></td>
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<p align="center">风阀执行器</p></td>
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<p align="center">&nbsp;</p></td></tr></tbody></table></div>
<p><b>控制说明</b><b></b></p>
<p>l&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 压差传感器测量室内与参照区域的压差(OP)，与设定值比较，控制器经过PID运算，输出控制信号到新风机电动风阀或者排风机电动风阀：正压控制：保持排风阀开度不变，调节新风阀开度；负压控制：保持新风阀开度不变，调节排风阀开度。 </p>
<p>l&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 对于空间较大的净化车间，也可以采取同时调节新风阀和排风阀的方式，两者控制方向相反，例如为了提高正压，在开大新风阀的同时，关小排风阀。</p>
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