Patent ID: 8652242

Claim:
A dust collection device, which comprises a machine body, a chassis, and a mechanics case; the machine body forming therein an air chamber, the air chamber receiving a plurality of filter cans arranged therein, the machine body having a top to which an upper spacer board is mounted to close the air chamber and forming a plurality of air holes corresponding to the filter cans located inside the air chamber, the upper spacer board having a side portion forming an air guide passage corresponding to the mechanics case, the upper spacer board being covered by a top board arranged thereon to define an air conduction chamber in communication with the air chamber and the mechanics case; the chassis being set under the machine body, the chassis comprising two side supports arranged below the machine body, the two side supports defining therebetween a receiving space, the receiving space receiving therein a dust collection tank for collecting dust; the mechanics case being arranged at one side of the machine body, the mechanics case comprising a motor and blower assembly that generates an air flow, the mechanics case comprising a partition board at one side of the motor and blower assembly facing the machine body, the mechanics case being divided by the partition board into an inlet flow channel and an outlet flow channel, wherein the inlet flow channel corresponds to the air guide passage of the upper spacer board of the machine body, the partition board forming an air vent hole communicating between the inlet flow channel and the outlet flow channel, the partition board comprising a block unit mounted thereto to selectively block the air vent hole; and the block unit comprising a block plate, which is operated by a driving element to selectively block the air vent hole of the partition board, the block unit comprising a detection element that is arranged inside the air chamber of the machine body and coupled to the driving element.