| 摘要 |
<p>In an electric dust collecting apparatus of the type that a dust collecting effect is achieved by applying a high D.C. voltage between dust collecting electrodes, wherein the high voltage is controlled via a typical power control device including thyristors, there is provided an additional control circuit for intermittently controlling the power control device in such a manner that both the repetition to generate an intermittent high voltage output in rate and, the pulse width of the D.C. high voltage output may be adjusted either manually or automatically so as to improve the dust collecting efficiency of the apparatus and to reduce the power consumption thereof.</p> |
