| 摘要 |
The present invention relates to a device for blocking backflow of dirty air (air containing dirt, dust, etc) installed in a dust collector or the like. More specifically, the device of the present invention: is capable of preventing backflow of dirty air by being automatically opened and closed by self-load and air pressure within a chamber; has a simple structure in a non-electronic and non-power manner and thus does not need to be controlled; and can greatly reduce manufacturing costs and maintenance costs. The device comprises: a supporting board (32) fixated inside a body (31); a border (33) formed around the edge of one side in the body (31); a plurality of air holes (34) horizontally formed on the supporting board (32); a blocking board (37) installed on one side of the supporting board (32) with a pair of hinges (35, 36) to individually open and close the air holes (34); and a packing (39) which is combined with a curved part (38) of the blocking board (37), and adheres to a front surface part (32a) of the supporting board (32) by the self-load of the blocking board (37). |
