| 摘要 |
PURPOSE: A dust collector is provided to prevent dust from flowing back into an air discharge pipe together with the external air, and to remove the dust contained the external air through two stages by a first and a second dust collecting unit, thereby increasing dust collection efficiency without using a separated filter. CONSTITUTION: A dust collector comprises a dust collection tank(22), an air discharge pipe(26), a cone type leading block(28), a dust passage(30), a first dust collection unit(20), a dust collection tank(42), two or more external containers(43), a unit air discharge pipe, a unit cone type leading block(48), a dust passage(50), a dust storage tank(44), a suction fan(80), and a second dust collection unit(40). The air discharge pipe discharges the external air with dust removed by centrifugal force, wherein the air is supplied to the dust collection tank. A cone type leading block is molded in a cone shape and leads the external air to rotate. The dust passage is formed between the circumference of the lower end(28b) of the cone type leading block and the inner wall of the lower end(22a) of the dust collection tank, and uses centrifugal force to pass through the dust separated from the external air. The first dust collection unit comprises a dust storage tank(24) which stores the dust passing through the dust passage. The second dust collection unit comprises an air circulation pipe(52) ejecting the external air inhaled by the operation of the suction fan to the outside. |
