| 摘要 |
The invention relates to a device for purifying used air containing harmful substances, comprising a reaction stage according to the photooxidation principle. The reaction stage encompasses at least one air conduit inside which a tubular UV emitter is disposed along the direction of flow of the used air. In order to increase the decomposition rate within the used air conduit in a simple manner, the cross section of the at least one air conduit is embodied as a regular polygon having at least five sides.
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