| 摘要 |
A fume hood removes cooking odors such as grease from the air by providing positive contact with a recyclable water-detergent solution, thus serving to condense and emulsify the grease and thereby remove it. Positive contact with the water is caused by having a water-washed screen across the inlet of the hood, the screen having a mesh designed to cause a close interweaving of the air and water. The air then passes through the remainder of the hood and any remaining grease is removed by turbulent contact of air and water in the passage or along the inner sides of the hood. Through a series of one or more sloping dividers in the exhaust hood, the input recycled water may also create additional "waterfall" washing steps. The unit is maintained substantially at room temperature, even though receiving heated contaminated air, due to heat absorption by water evaporation in the washing process.
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