FILTER APPARATUS FOR CLEANING REGENERATION

摘要

PROBLEM TO BE SOLVED: To obtain a filter apparatus for cleaning regeneration by which the identification of the maintenance periods of a pre-filter and a main filter is made possible and the annual total maintenance period by maintenance personnel is reduced. SOLUTION: The filter apparatus is provided with the main filter 1 which catches and stores extremely minute dust and a pre-filter 2 which is disposed on the front surface of the main filter and catches and stores the relatively coarse dust. The apparatus is configured to clean or exchange the main filter and the pre-filter respectively in different periods in compliance with the maintenance period of the main filter and the maintenance period of the pre-filter, in which the pre-filter is constituted of one layer structure of a nonwoven fabric to increase a surface area and to prolong a continuous use period of the pre-filter itself and thereby the maintenance period of the pre-filter is matched with the maintenance period of the main filter so that the main filter and the pre-filter can be cleaned and exchanged in the same maintenance period. COPYRIGHT: (C)2007,JPO&INPIT