| 摘要 |
A cyclonic dust-collecting apparatus has a cyclone body (110) has an air inlet (111) for drawing in dust-carrying air, and an air outlet (112) connected with a suction source. The vacuum provided by the suction source draws air from the air outlet (112) after it has passed through the cyclone body (110) from the air inlet (111). As the air flows through the cyclone body (110), it forms a whirling stream in the cyclone body. The whirling stream creates a centrifugal force on dust particles that are suspended in the air, which, because of their greater mass, causes them to become separated from the air that is drawn out of the whirling stream and into the air outlet (112) by the suction source. The air outlet (112) is provided with a passage guide member (113) that reduces the speed of air discharged via the air outlet and also guides a streamlined flow of air therethrough. The passage guide member (113) reduces the pressure loss which would otherwise be produced by a turbulent flow generated during discharge of cleaned air, such that the load on the suction source decreases, and the power consumption for operating the cyclonic dust-collecting apparatus is reduced. The passage guide member is preferably curved such that the portion closest to the cyclone (210a) is roughly transverse to the air flow and the portion furthest from the cyclone (210b) is parallel to the air flow. In an alternate embodiment the passage guide member consists of a number of 'S'-shaped vanes (220) where the 'S'-shape is transverse to the air flow. |
