| 摘要 |
<p>The present invention relates to an air purifier for removing dirt from an airstream, having a filter module, which filter module comprises at least one permeable filter layer for accumulating the dirt on the filter layer. According to the invention, a bypass channel is provided and constructed in such a manner that some of the airstream can pass by each filter layer unfiltered. Surprisingly, the purifying action of the filter module scarcely suffers owing to such a bypass channel, at least provided that the filter layer is not yet blocked with impurities, since in this case the majority of the airstream, in the absence of resistance, takes the primarily provided way through the filter layer. Only when the filter layer becomes blocked and the resistance to the airstream increases there, does air increasingly flow through said bypass channel.</p> |
