| 摘要 |
<p>An airflow filter device is employed, for example, in an air-conditioning system for a vehicle and a construction machine. The filter device has a filter (35) for purifying an airflow, an ammeter (72) for detecting clogging in the filter (35), a filter cleaning warning light (77) that provides a warning to clean the filter (35) when the number of times of clogging in the filter (35), which is detected by the ammeter (72), is equal to or less than a threshold value, and a filter replacement warning light (78) that provides a warning to replace the filter (35) when the number of times of clogging exceeds the threshold value.</p> |
