| 摘要 |
<P>PROBLEM TO BE SOLVED: To sufficiently remove dust from heat to be discharged to outside a device body while suppressing upsizing and a noise increase in an exhaust fan. <P>SOLUTION: A first filter 101A being a transmission type filter and a second filter 103 being a collision type filter are arranged in series with an air flow, and a collision surface 103A of the second filter 103 is arranged nearly in parallel to a macroscopic air flow having passed (having been transmitted) through the filter 101A. Consequently, dust in the air flow is removed by the two kinds of filters arranged in series with the air flow, so sufficient dust removing capability can be secured by the two kinds of filters on the whole without making small fine air passages formed in the first filter 101A being the transmission type filter, and an increase in ventilation resistance that the first filter 101A has can be suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
