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無塵車間與塵埃粒子計數器

发布日期：2025-09-16 13:10:43 作者：揚塵檢測儀來源：揚塵監測系統浏覽量：6

無塵車間（潔淨室）是通過技術手段控制室內汙染物濃度的特殊空間，潔淨度檢測是評估其環境達標的關鍵，塵埃粒子計數器則是主要的檢測設備。

洁净度分级直接决定采样体积标准，GBJ73-84 明确规定：100级洁净室单次取样量需≥1L，1000～10000 级需≥0.3L，万级需≥0.1L。其中100级洁净室推荐使用高流量计数器，若不具备相关设备，也必须保证单次采样体积不小于1L。实际检测时，需在满足对应级别最小采样体积要求的基础上，尽量选用大流量设备。

當前潔淨度檢測以光散射粒子計數器爲主，工作原理是通過捕捉微粒散射的光線，換算得出微粒的粒徑與數量。這類設備能自動連續測量室內空氣含塵量，直接顯示瞬時粉塵濃度，還可實現不同粒徑濃度的測量，操作便捷高效。按光學結構劃分，它主要有側散射型（照明與檢測系統光軸交叉）和後向散射型（兩系統光軸共線）兩類，相比電子顯微鏡等設備更適用于實時監測場景。

采样过程需遵循等速原则，即采样管入口方向要与被采样单向气流方向一致，且入口空气平均速度需与测点气流平均速度相同。非等速采样对≤0.5μm 的颗粒影响较小，但会导致≥0.5μm 颗粒的浓度计算失真。

检测点布局需符合 GB50073-2013《洁净厂房设计规范》：所有测点均位于距室内地坪 1.00m 的水平面内；单向流洁净室测点总数不少于 20 个，间距控制在 0.5～2.0m，水平单向流的测点仅布置在工作区域内；非单向流洁净室面积≤50m? 时，需布置5 个测点。

尘埃粒子计数器

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