| 摘要 |
An air cleaner (10) adapted to admit a flow of air containing entrained particles and to remove some of the particles from the air and expel the air and any remaining particles comprises a plurality of non-conductive filter elements (22,24). Means (16a, 16b, 18) are provided for supporting the filter elements in spaced relationship to each other. The filter elements define a plurality of macroscopic passages (46) for the flow of air which are very small but not microscopic in size. Means (26) for concentrating electrical charges of opposite polarity on facing surfaces of adjacent filter elements is also provided.
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