负离子发生器车内微颗粒净化效率研究

由于汽车的普及,车内的空气质量引发消费者越来越多的关注。糟糕的车内空气质量会增大人们罹患某种特定疾病的概率,因此控制与减少车内空气污染成为汽车生产设计商所追求的目标。微颗粒污染物,即PM2.5是车内空气污染物的重要来源之一。负离子因能有效沉降空气中的微颗粒,成为车内快速去除微颗粒污染的重要手段。在文章中,我们通过在车内进行微颗粒沉降实验,记录微颗粒物浓度在负离子仪以及车内空调内/外循环净化模式下的变化,并通过SPSS与MATLAB对污染物浓度进行数学建模分析。结果表明:单独使用负离子仪器并无法有效降低车内空气的颗粒浓度,而必须配合车内空气循环系统。在负离子作用下,结合车内空气循环系统,微颗粒浓度迅速下降,下降速度与空气交换速度和微颗粒在空气中的迁移速度相关。

Efficiency Study of Negative Ions in Automobile Internal Air Cleaning

With the increasing popularity of cars,air quality in an automobile cabin has become a concern for the automobile users because a worse air quality will increase the chances for contracting related diseases.Built-in techniques for controlling and diminishing pollution inside a vehicle have attracted attentions from automobile designers.Micro-particle pollutants,such as PM2.5 is one of the major pollutants in the automobile air environment.Negative ions can efficiently remove micro-particle pollutes via the agglomerations and settlement of particles.Therefore,it has become the main technique to remove particle pollutes inside a car.In this study,changes of micro-particle concentration were monitored with an particle counter in different car air circulation modes with or without negative ions.Data were collected and analyzed by SPSS and MATLAB.The results show negative ions can not effectively remove particle pollutants and the combination of negative ions and air circulation is necessary.Under the influences of negative ions,concentration of micro-particles in the vehicle is governed by air exchange rate and particle diffusion rate.