| 摘要 |
The invention relates to a closed air circulation system for an apparatus us ed for sorting wood chips (1), containing chips (11, 12) in a variety of sizes and/or fines particles (13), in a wood chips processing chamber (17), in separate fractions by means of a gas flow (4), which is delivered from one o r more nozzle chambers (8, 8') by way of a nozzle slit (3) into the wood chips processing chamber (17) and which applies an impulse action to the processin g- bound wood chips (1) sliding along an inclined support surface (2). Air is circulated from the wood chips processing chamber (17) by way of a dedusting cyclone (18) into said one or more nozzle chambers (8, 8').
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