| 摘要 |
PROBLEM TO BE SOLVED: To provide a dust filter capable of suppressing rising of ventilation resistance of a filtration member. SOLUTION: The dust filter 40 stores the filtration member 44 for filtrating air in a casing 42. The dust filter 40 is provided with a dust trap chamber 55 communicated with a space part 60 at an air introduction side in the casing 42 and storing the dust peeled off from the filtration member 44; and a reverse flow prevention wall 70 for preventing reverse flow of the dust from the dust trap chamber 55 to the space part 60 at the air introduction side. The dust peeled off from the filtration member 44 is stored in the dust trap chamber 55 through the space part 60 at the air introduction side and the reverse flow is prevented by the reverse flow prevention wall 70. COPYRIGHT: (C)2008,JPO&INPIT
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