小环境空气清新器的设计

本文设计了一种空气清新器，主要适用于汽车等小环境场合，本设计采用两块555时基电路组成的多谐振荡器作为定时电路和高频脉冲发生电路，通过改变电容电阻的大小可以改变清新器的工作时间。高频变压器将电压升高至3kV，使放电器电离空气产生负离子，负离子在风扇电机的作用下更好地扩散到周围空气去。

The Design of Small Ambient Air Pure and Fresh Machine

This paper designed a kind of fresh air unit, mainly is suitable for the ear, and other small environment situation, the design used two pieces of 555 time-base circuit composed of muhivibrator as timing circuit and high frequency pulse generating circuit, by changing the capacitance resistance size can change the pure and fresh and apparatus of working time. High frequency transformer will voltage rise to 3kV, make the discharger ionization air produce anion, negative ions in the fan motor under the action of better diffusion into the surrounding air.