| 摘要 |
<p>A filter comprises housing (101) containing adsorptive medium (122) which filters airflow (104). Medium (122) is held between webs of mesh (105, 106) having angled perforations. To prevent air bypassing medium (122) via any gaps between medium (122) and sidewalls (102, 103) a baffle is provided. The baffle may take the form of a flange (100) (angled, as shown, against the flow) or may be a perforated sheet. The filter may have further web (105a) upstream of web (105) and mechanical pre-filter (119) and electrostatic layer (121).</p> |
