Chen Jia-Kun
Institute of Occupational Medicine and Industrial Hygiene, National Taiwan University, Taiwan.
Ind Health. 2015;53(4):346-53. doi: 10.2486/indhealth.2014-0191. Epub 2015 Mar 26.
The inclined air-curtain technology was applied to build an inclined air-curtain range hood. A draft generator was applied to affect the inclined air-curtain range hood in three directions: lateral (θ=0°), oblique (θ=45°), and front (θ=90°). The three suction flow rates provided by the inclined air-curtain range hood were 10.1, 10.9, and 12.6 m(3)/min. The laser-assisted flow visualization technique and the tracer-gas test method were used to investigate the performance of the range hood under the influence of a draft. The results show that the inclined air-curtain range hood has a strong ability to resist the negative effect of a front draft until the draft velocity is greater than 0.5 m/s. The oblique draft affected the containment ability of the inclined air-curtain range hood when the draft velocity was larger than 0.3 m/s. When the lateral draft effect was applied, the capture efficiency of the inclined air-curtain range hood decreased quickly in the draft velocity from 0.2 m/s to 0.3 m/s. However, the capture efficiencies of the inclined air-curtain range hood under the influence of the front draft were higher than those under the influence of the oblique draft from 0.3 m/s to 0.5 m/s.
采用倾斜气幕技术构建了倾斜气幕抽油烟机。应用通风机在三个方向（横向（θ=0°）、斜向（θ=45°）和正向（θ=90°））对倾斜气幕抽油烟机施加影响。倾斜气幕抽油烟机提供的三种吸风量分别为10.1、10.9和12.6立方米/分钟。利用激光辅助流动可视化技术和示踪气体测试方法研究了通风对抽油烟机性能的影响。结果表明，在通风速度大于0.5米/秒之前，倾斜气幕抽油烟机具有很强的抵抗正向通风负面影响的能力。当通风速度大于0.3米/秒时，斜向通风会影响倾斜气幕抽油烟机的捕集能力。当施加横向通风影响时，倾斜气幕抽油烟机在通风速度从0.2米/秒增加到0.3米/秒时捕集效率迅速下降。然而，在通风速度从0.3米/秒到0.5米/秒的范围内，倾斜气幕抽油烟机在正向通风影响下的捕集效率高于斜向通风影响下的捕集效率。
