| 摘要 |
<p>A fluid extraction apparatus comprises a passage (20) for the pumped flow therealong of a first fluid, for example air. A fluid flow area control device in the form of an apertured plug (22) is present in the passage. An inlet (26) to the passage (20) is provided at or downstream of the downstream side of the plug (22). When, in use, the first fluid is pumped along the passage through the aperture (23) of the plug (22) the fluid pressure at the inlet (26) is reduced causing a second fluid to be drawn into the passage 201 via the inlet (26) to flow with the first fluid towards the downstream end of the passage (20). The downstream end of the passage may be provided with a filter (6) in the form of a tank (8) containing an oil dissolving agent (10). The apparatus has a particular application to a cooker hood assembly for extracting a gas from a cooker hood (2), without having to pass the gas through a pump (4), and then treating the extracted gas to remove pollutants such as water, oil droplets and smoke therefrom.</p> |
