| 摘要 |
A plurality of cyclone dirt separators 12, where the core flows 9, of low particle density, are directed through an air filter 3 with filter medium 27, which is connected to the carburettor (7, fig 1). The peripheral flows 10 of the cyclones 12, of high particle density, are directed through discharge screws 42, merged into pairs, and then merged into a common dirt collection passage 17, wherein a dividing wall (71, fig 5) is positioned so as to alter the cross-sectional area of the passage, hence ensuring equal pressure in all of the cyclones 12. The dirt collection passage 17 is connected to discharge passage 21, the end of which is situated adjacent to the low pressure side of a fan (22, fig 2).
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