Patent ID: 8679213

Claim:
A dust collector for catching dust in an air flow, comprising a box; a plurality of separating boards partitioning the box to form an air flow channel, wherein the air flow channel has an inlet and an outlet, and wherein the air flow channel is divided into an incoming region, a first catch region, a second catch region, and an outgoing region; a plurality of catch boards respectively being located in the air flow channel and having a plurality of pores, wherein diameter of the plurality of pores on the catch boards in the first catch region, the second catch region or the outgoing region positively correlates with distance between the catch boards and the outlet, and wherein number of the plurality of pores on the catch boards positively correlates with distance between the catch boards and the inlet; and a plurality of baffle boards arranged in the incoming region and aligned in rows and columns with the catch boards, wherein the incoming region has a superimposition region at a middle thereof along a direction from the inlet to the outlet, and wherein the plurality of pores of the catch boards in the superimposition region are overlapped.